{"id":23776,"date":"2021-05-29T14:39:40","date_gmt":"2021-05-29T09:09:40","guid":{"rendered":"https:\/\/ncertsolutions.guru\/?p=23776"},"modified":"2021-05-29T14:39:40","modified_gmt":"2021-05-29T09:09:40","slug":"ncert-solutions-for-class-9-science-chapter-7","status":"publish","type":"post","link":"https:\/\/ncertsolutions.guru\/ncert-solutions-for-class-9-science-chapter-7\/","title":{"rendered":"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms"},"content":{"rendered":"<p>These <a href=\"https:\/\/ncertsolutions.guru\/ncert-solutions-for-class-9-science\/\">NCERT Solutions for Class 9 Science<\/a> Chapter 7 Diversity in Living Organisms Questions and Answers are prepared by our highly skilled subject experts to help students while preparing for their exams.<\/p>\n<h2>Diversity in Living Organisms NCERT Solutions for Class 9 Science Chapter 7<\/h2>\n<h3><span id=\"Class_8_Science_Chapter_1_Crop_Production_and_Management_Exercise_Questions_and_Answers\">Class 9 Science Chapter 7 Diversity in Living Organisms InText Questions and Answers<\/span><\/h3>\n<p>Question 1.<br \/>\nWhy do we classify organisms?<br \/>\nAnswer:<br \/>\nThere are a wide range of life forms (about 10 million &#8211; 13 million species) around us. These life forms have existed and evolved on the Earth over millions of years ago. The huge range of these life forms makes it very difficult to study them one by one. Therefore, we look for similarities among them and classify them into different classes to study these different classes as a whole. Thus, classification makes our study easier.<\/p>\n<p>Question 2.<br \/>\nGive three examples of the range of variations that you see in life-forms around you.<br \/>\nAnswer:<br \/>\nExamples of range of variations observed in daily life are:<\/p>\n<ul>\n<li>Variety of living organisms in terms of size ranges from microscopic bacteria to tall trees of 100 metres.<\/li>\n<li>The colour, shape, and size of snakes are. completely different from those of lizards.<\/li>\n<li>The life span of different organisms is also quite varied. For example, a crow lives for only 15 years, whereas a parrot lives for about 140 years.<\/li>\n<\/ul>\n<p>Question 3.<br \/>\nWhich do you think is a more basic characteristic for classifying organisms?<br \/>\n(a) The place where they live.<br \/>\n(b) The kind of cells they are made of. Why?<br \/>\nAnswer:<br \/>\nThe kind of cells that living organisms<br \/>\nare made up of is a more basic characteristic for classifying organisms, than on the basis of their habitat. This is because on the basis of the kind of cells, we can classify all living organisms into eukaryotes and prokaryotes. On the other hand, a habitat or the place where an organism lives is a very broad characteristic to be used as the basis for classifying organisms. For example, animals that live on land include earthworms, mosquitoes, butterfly, rats, elephants, tigers, etc.<\/p>\n<p>These animals do not resemble each other except for the fact that they share a common habitat. Therefore, the nature or kind of a cell is considered to be a fundamental characteristic for the classification of living organisms.<\/p>\n<p>Question 4.<br \/>\nWhat is the primary characteristic on which the first division of organisms is made?<br \/>\nAnswer:<br \/>\nThe primary characteristic on which the first division of organisms is made is the nature of the cell. It is considered to be the fundamental characteristic for classifying all living organisms. Nature of the cell includes the presence or absence of membrane-bound organelles.<\/p>\n<p>Therefore, on the basis of this fundamental characteristic, we can classify all living organisms into two broad categories of eukaryotes and prokaryotes. Then, further classification is made on the basis of cellularity or modes of nutrition.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 5.<br \/>\nOn what basis are plants and animals put into different categories?<br \/>\nAnswer:<br \/>\nPlants and animals differ in many features such as the absence of chloroplasts, presence of cell wall, etc. But, locomotion is considered as the characteristic feature that separates animals from plants.<\/p>\n<p>This is because the absence of locomotion in plants gave rise to many structural changes such as the presence of a cell wall (for protection), the presence of chloroplasts (for photosynthesis) etc. Hence, locomotion is considered to be the basic characteristic as further differences arose because of this characteristic feature.<\/p>\n<p>Question 6.<br \/>\nWhich organisms are called primitive and how are they different from the so-called advanced organisms?<br \/>\nAnswer:<br \/>\nA primitive organism or lower organism is the one which has a simple body structure and ancient body design or features that have not changed much over a period of time. An advanced organism or higher organism has a complex body structure and organization. For example, an Amoeba is more primitive as compared to a starfish. Amoeba has a simple body structure and primitive features as compared to a starfish. Hence, an Amoeba is considered more primitive than a starfish.<\/p>\n<p>Question 7.<br \/>\nWill advanced organisms be the same as complex organisms? Why?<br \/>\nAnswer:<br \/>\nIt is not always true that an advanced organism will have a complex body structure. But, there is a possibility that over the evolutionary time, complexity in body design will increase. Therefore, at times, advanced organisms can be the same as complex organisms.<\/p>\n<p>Question 8.<br \/>\nWhat is the criterion for classification of organisms as belonging to kingdom Monera or Protista?<br \/>\nAnswer:<br \/>\nThe criterion for the classification of organisms belonging to kingdom Monera or Protista is the presence or absence of a well-defined nucleus or membrane-bound organelles. Kingdom Monera includes organisms that do not have a well-defined nucleus or membrane-bound organelles and these are known as prokaryotes.<\/p>\n<p>Kingdom Protista, on the other hand, includes organisms with a well-defined nucleus and membrane-bound organelles and these organisms are called eukaryotes.<\/p>\n<p>Question 9.<br \/>\nIn which kingdom will you place an organism which is single-celled, eukaryotic and photosynthetic?<br \/>\nAnswer:<br \/>\nKingdom Protista includes single celled, eukaryotic, and photosynthetic organisms.<\/p>\n<p>Question 10.<br \/>\nIn the hierarchy of classification, which grouping will have the smallest number of organisms with a maximum of characteristics in common and which will have the largest number of organisms?<br \/>\nAnswer:<br \/>\nIn the hierarchy of classification a species will have the smallest number of organisms with a maximum of characteristics in common, whereas the kingdom will have the largest number of organisms.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 11.<br \/>\nWhich division among plants has the simplest organisms?<br \/>\nAnswer:<br \/>\nThallophyta is the division of plants that has the simplest organisms. This group includes plants, which do not contain a well differentiated plant body. Their body is not differentiated into roots, stems, and leaves. They are commonly known as algae.<\/p>\n<p>Question 12.<br \/>\nHow are pteridophytes different from the phanerogams?<br \/>\nAnswer:<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Pteridophyta<\/td>\n<td style=\"text-align: center;\" width=\"312\">Phanerogams<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. They have inconspicuous or less differentiated reproductive organs.<\/td>\n<td width=\"312\">1. They have well developed reproductive organs.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. They produce naked embryos called spores.<\/td>\n<td width=\"312\">2. They produce seeds.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">3. Ferns, Marsilea, Equisetum, etc. are examples of Pteridophyta.<\/td>\n<td width=\"312\">3. Pinus, Cycas, fir, etc. are examples of phanerogams.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Question 13.<br \/>\nHow do gymnosperms and angiosperms differ from each other?<br \/>\nAnswer:<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Gymnosperm<\/td>\n<td style=\"text-align: center;\" width=\"312\">Angiosperms<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. They are non-flowering plants.<\/td>\n<td width=\"312\">1. They are flowering plants.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. Naked seeds not enclosed inside fruits are produced.<\/td>\n<td width=\"312\">2. Seeds are enclosed inside fruits.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">3. Pinus, Cedar, fir, Cycas, etc. are some examples of gymnosperms.<\/td>\n<td width=\"312\">3. Coconut, palm, mango, etc. are some examples of angiosperms.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 14.<br \/>\nHow do poriferan animals differ from coelenterate animals?<br \/>\nAnswer:<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Porifera<\/td>\n<td style=\"text-align: center;\" width=\"312\">Coelenterate<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. They are mostly marine, non-motile, and .found attached to rocks.<\/td>\n<td width=\"312\">1. They are exclusively marine animals that either live in colonies or have a solitary life-span.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. They show cellular level of organisation.<\/td>\n<td width=\"312\">2. They show tissue level of organisation.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">3. Spongilla, Euplectella, etc. are poriferans.<\/td>\n<td width=\"312\">3. Hydra, sea anemone, corals, etc. are coelenterates.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Question 15.<br \/>\nHow do annelid animals differ from arthropods?<br \/>\nAnswer:<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Annelids<\/td>\n<td style=\"text-align: center;\" width=\"312\">Arthropoda<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. The circulatory system of annelids is closed.<\/td>\n<td width=\"312\">1. Arthropods have an open circulatory system<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. The body is divided into several identical segments.<\/td>\n<td width=\"312\">2. The body is divided into few specialized segments.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Question 16.<br \/>\nWhat are the differences between amphibians and reptiles?<br \/>\nAnswer:<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Amphibian<\/td>\n<td style=\"text-align: center;\" width=\"312\">Reptiles<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. They have a dual mode of life.<\/td>\n<td width=\"312\">1. They are completely terrestrial.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. Scales are absent.<\/td>\n<td width=\"312\">2. Skin is covered with scales.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">3. They lay eggs in water.<\/td>\n<td width=\"312\">3. They lay eggs on land.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">4. It includes frogs, toads, and salamanders.<\/td>\n<td width=\"312\">4. It includes lizards, snakes, turtles, chameleons, etc.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Question 17.<br \/>\nWhat are the differences between animals belonging to the Aves group and those in the mammalia group?<br \/>\nAnswer:<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Aves<\/td>\n<td style=\"text-align: center;\" width=\"312\">Mammalia<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. Most birds have feathers and they possess a beak.<\/td>\n<td width=\"312\">1. They do not have feathers and the beak is also absent.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. They lay eggs. Hence, they are oviparous.<\/td>\n<td width=\"312\">2. Some of them lay eggs and some give birth to young ones. Hence, they are both oviparous and viviparous.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">3. Their bones are light and pneumatic.<\/td>\n<td width=\"312\">3. Their bones are hard and solid.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">4. Example : Birds like sparrow, crow, parrot, etc.<\/td>\n<td width=\"312\">4. Example: Animals like cow, deer, humans, lion, zebra and whale.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span id=\"Class_8_Science_Chapter_1_Crop_Production_and_Management_Exercise_Questions_and_Answers\">Class 9 Science Chapter 7 Diversity in Living Organisms Textbook Questions and Answers<\/span><\/h3>\n<p>Question 1.<br \/>\nWhat are the advantages of classifying organisms?<br \/>\nAnswer:<br \/>\nThere are a wide range of life forms (about 10 million-13 million species) around us. These life forms have existed and evolved on the Earth over millions of years ago. The huge range of these life forms makes it very difficult to study them one by one. Therefore, we look for similarities among them and classify them into different classes so that we can study these different classes as a whole. This makes our study easier.<\/p>\n<p>Therefore, classification serves the following advantages:<\/p>\n<ul>\n<li>It determines the methods of organising the diversity of life on Earth.<\/li>\n<li>It helps in understanding millions of life forms in detail.<\/li>\n<li>It also helps in predicting the line of evolution.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 2.<br \/>\nHow would you choose between two characteristics to be used for developing a hierarchy in classification?<br \/>\nAnswer:<br \/>\nFor developing a hierarchy of classification, we choose the fundamental characteristic among several other characteristics. For example, plants differ from animals in the absence of locomotion, chloroplasts, cell wall, etc. But, only locomotion is considered as the basic or fundamental feature that is used to distinguish between plants and animals. This is because the absence of locomotion in plants gave rise to many structural changes such as the presence of a cell wall for protection, and the presence of chloroplast for photosynthesis (as they cannot move around in search of food like animals).<\/p>\n<p>Thus, all these features are a result of locomotion. Therefore, locomotion is considered to be a fundamental characteristic. By choosing the basic or fundamental characteristic, we can make broad divisions in living organisms as the next level of characteristic is dependent on these. This goes on to form a hierarchy of characteristics.<\/p>\n<p>Question 3.<br \/>\nExplain the basis for grouping organisms into five kingdoms.<br \/>\nAnswer:<br \/>\nRE Whittaker proposed a five kingdom classification of living organisms on the basis of Linnaeus system of classification. The five kingdoms proposed by Whittaker are Monera, Protista, Fungi, Plantae, and Animalia.<\/p>\n<p>The basis for grouping organisms into five kingdoms is as follows:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23777\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-1.png?resize=471%2C387&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 1\" width=\"471\" height=\"387\" srcset=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-1.png?w=471&amp;ssl=1 471w, https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-1.png?resize=300%2C246&amp;ssl=1 300w\" sizes=\"(max-width: 471px) 100vw, 471px\" data-recalc-dims=\"1\" \/><br \/>\n(i) On the basis of the presence or absence of membrane-bound organelles, all living or<br \/>\nganisms are divided into two broad categories of eukaryotes and prokaryotes. This division lead to the formation of kingdom Monera, which includes all prokaryotes.<\/p>\n<p>(ii) Then, eukaryotes are divided a unicellular and multicellular, on the basis of cellularity. Unicellular eukaryotes form kingdom Protista, and multicellular eukaryotes form kingdom Fungi, Plantae, and Animalia.<\/p>\n<p>(iii) Animals are then separated on the basis of the absence of a cell wall.<\/p>\n<p>(iv) Since fungi and plants both contain a cell wall, they are separated into different kingdoms on the basis of their modes of nutrition. Fungi have saprophytic mode of nutrition, whereas plants have autotrophic mode of nutrition. This results in the formation of the five kingdoms.<\/p>\n<p>Question 4.<br \/>\nWhat are the major divisions in the Plantae? What is the basis for these divisions?<br \/>\nAnswer:<br \/>\nThe kingdom Plantae is divided into five main divisions: Thallophyta, Bryophyta, Pteridophyta, Gymnosperms, and Angiosperms.<\/p>\n<p>The classification depends on the following criteria:<\/p>\n<ul>\n<li>Differentiated\/ Undifferentiated plant body<\/li>\n<li>Presence \/absence of vascular tissues<\/li>\n<li>With\/without seeds<\/li>\n<li>Naked seeds\/ seeds inside fruits<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-23778\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-2.png?resize=482%2C366&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 2\" width=\"482\" height=\"366\" srcset=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-2.png?w=482&amp;ssl=1 482w, https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-2.png?resize=300%2C228&amp;ssl=1 300w\" sizes=\"(max-width: 482px) 100vw, 482px\" data-recalc-dims=\"1\" \/><\/p>\n<p>(i) The first level of classification depends on whether a plant body is well differentiated or not. A group of plants that do not have a well differentiated plant body are known as Thallophyta.<\/p>\n<p>(ii) Plants that have well differentiated body parts are further divided on the basis of the presence or absence of vascular tissues. Plants without specialised vascular tissues are included in division Bryophyta, whereas plants with vascular tissues are known as Tracheophyta.<\/p>\n<p>(iii) Tracheophyta is again sub-divided into division Pteridophyta, on the basis of the absence of seed formation.<\/p>\n<p>(iv) The other group of plants having well developed reproductive organs that finally develop seeds are called Phanerogams. This group is further sub-divided on the basis of whether the seeds are naked or enclosed in fruits. This classifies them into gymnosperms and angiosperms. Gymnosperms are seed bearing, non-flowering plants, whereas angiosperms are flowering plants in which the seeds are enclosed inside the fruit.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 5.<br \/>\nHow are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?<br \/>\nAnswer:<br \/>\nThe criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals because<\/p>\n<ul>\n<li>plants are fixed at a specific position while the animals are motile.<\/li>\n<li>plants are autotrophic while animals are heterotrophic therefore, their requirements and the circulation of the necessary substances in body is different.<\/li>\n<li>plants lack nervous system but animals from the phylum cinidaria onwards posses nervous system.<\/li>\n<\/ul>\n<p>Question 6.<br \/>\nExplain how animals in Vertebrata are classified into further subgroups.<br \/>\nAnswer:<br \/>\nAnimals in Vertebrata are classified into five classes:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23779\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-3.png?resize=402%2C231&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 3\" width=\"402\" height=\"231\" srcset=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-3.png?w=402&amp;ssl=1 402w, https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-3.png?resize=300%2C172&amp;ssl=1 300w\" sizes=\"(max-width: 402px) 100vw, 402px\" data-recalc-dims=\"1\" \/><br \/>\n(i) Class Pisces: This class includes fish such as Scoliodon, tuna, rohu, shark, etc. These animals mostly live in water. Hence, they have special adaptive features such as a streamlined body, presence of a tail for movement, gills, etc. to live in water.<\/p>\n<p>(ii) Class Amphibia: It includes frogs, toads, and salamanders. These animals have a dual mode of life. In the larval stage, the respiratory organs are gills, but in the adult stage, respiration occurs through the lungs or skin. They lay eggs in water.<\/p>\n<p>(iii) Class Reptilia: It includes reptiles such as lizards, snakes, turtles, etc. They usually creep or crawl on land. The body of a reptile is covered with dry and cornified skin to prevent water loss. They lay eggs on land.<\/p>\n<p>(iv) Class Aves: It includes all birds such as sparrow, pigeon, crow, etc. Most of them have feathers. Their forelimbs are modified into wings for flight, while hind limbs are modified for walking and clasping. They lay eggs.<\/p>\n<p>(v) Class Mammalia: It includes a variety of animals which have milk producing glands to nourish their young ones. Some lay eggs and some give birth to young ones. Their skin has hair as well as sweat glands to regulate their body temperature.<\/p>\n<h3><span id=\"Class_8_Science_Chapter_1_Crop_Production_and_Management_Exercise_Questions_and_Answers\">Class 9 Science Chapter 7 Diversity in Living Organisms Additional Important Questions and Answers<\/span><\/h3>\n<p>Question 1.<br \/>\nFind out incorrect sentence<br \/>\n(a) Protista includes unicellular eukaryotic organisms<br \/>\n(b) Whittaker considered cell structure, mode and source of nutrition for classifying the organisms in five kingdoms<br \/>\n(c) Both Monera and Protista may be autotrophic and heterotrophic<br \/>\n(d) Monerans have well defined nucleus<br \/>\nAnswer:<br \/>\n(d) Monerans have well defined nucleus<\/p>\n<p>Question 2.<br \/>\nWhich among the following has specialised tissue for conduction of water?<br \/>\n(i) Thallophyta<br \/>\n(ii) Bryophyta<br \/>\n(iii) Pteridophyta<br \/>\n(iv) Gymnosperms<br \/>\n(a) (i) and (ii)<br \/>\n(b) (ii) and (iii)<br \/>\n(c) (iii) and (iv)<br \/>\n(d) (i) and (iv)<br \/>\nAnswer:<br \/>\n(c) (iii) and (iv)<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 3.<br \/>\nWhich among the following produce seeds?<br \/>\n(a) Thallophyta<br \/>\n(b) Bryophyta<br \/>\n(c) Pteridophyta<br \/>\n(d) Gymnosperms<br \/>\nAnswer:<br \/>\n(d) Gymnosperms<\/p>\n<p>Question 4.<br \/>\nWhich one is a true fish?<br \/>\n(a) Jellyfish<br \/>\n(b) Starfish<br \/>\n(c) Dogfish<br \/>\n(d) Silverfish<br \/>\nAnswer:<br \/>\n(c) Dogfish<\/p>\n<p>Question 5.<br \/>\nWhich among the following is exclusively marine?<br \/>\n(a) Porifera<br \/>\n(b) Echinodermata<br \/>\n(c)Mollusca<br \/>\n(d) Pisces<br \/>\nAnswer:<br \/>\n(b) Echinodermata<\/p>\n<p>Question 6.<br \/>\nWhich among the following have open circulatory system?<br \/>\n(i) Arthropoda<br \/>\n(ii) Mollusca<br \/>\n(iii) Annelida<br \/>\n(iv) Coelenterata<br \/>\n(a) (i) and (ii)<br \/>\n(b) (iii) and (iv)<br \/>\n(c) (i) and (iii)<br \/>\n(d) (ii) and (iv)<br \/>\nAnswer:<br \/>\n(a) (i) and (ii)<\/p>\n<p>Question 7.<br \/>\nIn which group of animals, coelom is filled with blood?<br \/>\n(a) Arthropoda<br \/>\n(b) Annelida<br \/>\n(c) Nematoda<br \/>\n(d) Echinodermata<br \/>\nAnswer:<br \/>\n(a) Arthropoda<\/p>\n<p>Question 8.<br \/>\nElephantiasis is caused by<br \/>\n(a) Wuchereria<br \/>\n(b) Pinworm<br \/>\n(c) Planarians<br \/>\n(d) Liver flukes<br \/>\nAnswer:<br \/>\n(a) Wuchereria<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 9.<br \/>\nWhich one is the most striking or (common) character of the vertebrates?<br \/>\n(a) Presence of notochord<br \/>\n(b) Presence of triploblastic condition<br \/>\n(c) Presence of gill pouches<br \/>\n(d) Presence of coelom<br \/>\nAnswer:<br \/>\n(a) Presence of notochord<\/p>\n<p>Question 10.<br \/>\nWhich among the following have scales?<br \/>\n(i) Xmphibians<br \/>\n(ii) Pisces<br \/>\n(iii) Reptiles<br \/>\n(iv) Mammals<br \/>\n(a) (i) and (iii)<br \/>\n(b) (iii) and (iv)<br \/>\n(c) (ii) and (iii)<br \/>\n(d) (i) and (ii)<br \/>\nAnswer:<br \/>\n(c) (ii) and (iii)<\/p>\n<p>Question 11.<br \/>\nFind out the false statement<br \/>\n(a) Aves are warm blooded, egg laying and have four chambered heart<br \/>\n(b) Aves have feather covered body, fore limbs are modified as wing and breathe through lungs<br \/>\n(c) Most of the mammals are viviparous<br \/>\n(d) Fishes, amphibians and reptiles are oviparous<br \/>\nAnswer:<br \/>\n(d) Fishes, amphibians and reptiles are oviparous<\/p>\n<p>Question 12.<br \/>\nPteridophyta do not have<br \/>\n(a) root<br \/>\n(b) stem<br \/>\n(c) flowers<br \/>\n(d) leaves<br \/>\nAnswer:<br \/>\n(c) flowers<\/p>\n<p>Question 13.<br \/>\nIdentify a member of Porifera<br \/>\n(a) Spongilla<br \/>\n(b) Euglena<br \/>\n(c) Penicillium<br \/>\n(d) Hydra<br \/>\nAnswer:<br \/>\n(a) Spongilla<\/p>\n<p>Question 14.<br \/>\nWhich is not an aquatic animal?<br \/>\n(a) Hydra<br \/>\n(b) Jellyfish<br \/>\n(c) Corals<br \/>\n(d) Filaria<br \/>\nAnswer:<br \/>\n(d) Filaria<\/p>\n<p>Question 15.<br \/>\nAmphibians do not have the following<br \/>\n(a) Three chambered heart<br \/>\n(b) Gills or lungs<br \/>\n(c) Scales<br \/>\n(d) Mucus glands<br \/>\nAnswer:<br \/>\n(c) Scales<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 16.<br \/>\nOrganisms without nucleus and cell organelles belong to<br \/>\n(i) fungi<br \/>\n(ii) protista<br \/>\n(iii) cyano bacteria<br \/>\n(iv) archae bacteria<br \/>\n(a) (i) and (ii)<br \/>\n(b) (iii) and (iv)<br \/>\n(c) (i) and (iv)<br \/>\n(d) (ii) and (iii)<br \/>\nAnswer:<br \/>\n(b) (iii) and (iv)<\/p>\n<p>Question 17.<br \/>\nWhich of the following is not a criterion for classification of living organisms?<br \/>\n(a) Body design of the organism<br \/>\n(b) Ability to produce one\u2019s own food<br \/>\n(c) Membrane bound nucleus and cell organelles<br \/>\n(d) Height of the plant<br \/>\nAnswer:<br \/>\n(d) Height of the plant<\/p>\n<p>Question 18.<br \/>\nThe feature that is not a characteristic of protochordata?<br \/>\n(a) Presence of notochord<br \/>\n(b) Bilateral symmetry and coelom<br \/>\n(c) Jointed legs<br \/>\n(d) Presence of circulatory system<br \/>\nAnswer:<br \/>\n(c) Jointed legs<\/p>\n<p>Question 19.<br \/>\nThe locomotory organs of Echinoderms are<br \/>\n(a) tube feet<br \/>\n(b) muscular feet<br \/>\n(c) jointed legs<br \/>\n(d) parapodia<br \/>\nAnswer:<br \/>\n(a) tube feet<\/p>\n<p>Question 20.<br \/>\nCorals are<br \/>\n(a) Poriferans attached to some solid support<br \/>\n(b) Cnidarians, that are solitary living<br \/>\n(c) Poriferans present at the sea bed<br \/>\n(d) Cnidarians that live in colonies<br \/>\nAnswer:<br \/>\n(d) Cnidarians that live in colonies<\/p>\n<p><span style=\"color: #0000ff;\">Very Short Answer Questions<\/span><\/p>\n<p>Question 1.<br \/>\nWho is called as the father of taxonomy?<br \/>\nAnswer:<br \/>\nCarious Linneaus<\/p>\n<p>Question 2.<br \/>\nWhich division of plants is also considered as amphibian of plant kingdom?<br \/>\nAnswer:<br \/>\nBryophytes having motile sperms are considered as amphibian of plant kingdom.<\/p>\n<p>Question 3.<br \/>\nWhich is the first division of plants to bear true shoot and root?<br \/>\nAnswer:<br \/>\nPteridophytes are the first to bear true root and shoot.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 4.<br \/>\nWhat are sporophylls in ferns?<br \/>\nAnswer:<br \/>\nThe leaves bearing the sporangia on their lower surface are called the sporophylls.<\/p>\n<p>Question 5.<br \/>\nWhat are circinate leaves in a dryopteris?<br \/>\nAnswer:<br \/>\nCircinate leaves are young leaves with the top margins folded inwardly.<\/p>\n<p>Question 6.<br \/>\nWhich part of pinus plant bears naked seeds?<br \/>\nAnswer:<br \/>\nThe female cone in pinus plant bears the seeds.<\/p>\n<p>Question 7.<br \/>\nWhich is the lateral appendage of shoot in angiosperms that acts as the reproductive organ?<br \/>\nAnswer:<br \/>\nFlower is the lateral appendage of shoot that acts as the reproductive organ.<\/p>\n<p>Question 8.<br \/>\nWhich phase is dominant in a Funaria plant, gametophytic i sporophytic?<br \/>\nAnswer:<br \/>\nIn funaria, the gametophytic phase is dominant over the sporophytic phase.<\/p>\n<p>Question 9.<br \/>\nWhich type of spores are produced by the Funaria sporophyte?<br \/>\nAnswer:<br \/>\nThe sporophyte always produces the haploid spores that give rise gametophytic thallus.<\/p>\n<p>Question 10.<br \/>\nIn phanerogams, which plants bear the tap root system, gymnosperms or angiosperms?<br \/>\nAnswer:<br \/>\nIn phanerogams, the gymnosperms bear the tap roots.<\/p>\n<p>Question 11.<br \/>\nIn which plants the algae and fungi are present in the symbiotic relationship?<br \/>\nAnswer:<br \/>\nLichens consist of algae and fungi in the symbiotic relationship.<\/p>\n<p>Question 12.<br \/>\nWhich type of plants do you expect to observe in the artic regions?<br \/>\nAnswer:<br \/>\nBryophytes<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 13.<br \/>\nWhich division of plants consists mostly of ornamental plants?<br \/>\nAnswer:<br \/>\nPteridophytes, mostly ferns.<\/p>\n<p>Question 14.<br \/>\nName an aquatic pteridophyte that is capable of nitrogen fixation?<br \/>\nAnswer:<br \/>\nAzolla<\/p>\n<p>Question 15.<br \/>\nName any two products of economical value that are obtained from algae.<br \/>\nAnswer:<br \/>\nIodine from kelps and silica from diatoms.<\/p>\n<p>Question 16.<br \/>\nWhich term is used to describe the network of hyphae in Rhizopus?<br \/>\nAnswer:<br \/>\nMycelium<\/p>\n<p>Question 17.<br \/>\nWhich nutrient medium is mostly used in laboratory for culturing microorganisms?<br \/>\nAnswer:<br \/>\nAgar-agar, a product obtained from an algae is widely used as the culture medium.<\/p>\n<p>Question 18.<br \/>\nWhat are the male and female reproductive organs in a moss or fern?<br \/>\nAnswer:<br \/>\nIn a moss or fern, the male and female reproductive organs are multicellular. They are called antheridum and archegonium respectively.<\/p>\n<p>Question 19.<br \/>\nName the division of plants whose members show a clearly distinct phases of alternation of generation.<br \/>\nAnswer:<br \/>\nThe members of bryophytes shows a clearly distinct alternation of generation with gametophytic phase being dominant over the sporophytic phase.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 20.<br \/>\nHow is a protozoan different from a metazoan?<br \/>\nAnswer:<br \/>\nA protozoan is unicellular but a metazoan is multicellular.<\/p>\n<p>Question 21.<br \/>\nWhat is reproductive nature of an earthworm, unisexual or bisexual?<br \/>\nAnswer:<br \/>\nAn earthworm is bisexual, although the ovaries and testes mature at the different rimes.<\/p>\n<p>Question 22.<br \/>\nWhich cockroach has the larger antennae, male or female?<br \/>\nAnswer:<br \/>\nThe male cockroach has larger antennae than the female cockroach to perceive the odour in the surroundings.<\/p>\n<p>Question 23.<br \/>\nWhich phylum in animal kingdom has the largest and the second largest number of animals?<br \/>\nAnswer:<br \/>\nThe phylum arthropods has the largest and phylum mollusca has the second largest number of animals.<\/p>\n<p>Question 24.<br \/>\nWhich animal phylum is characterized by the presence of water canal system and water vascular system?<br \/>\nAnswer:<br \/>\nAnimals belonging to phylum Echinodermata have water vascular system, while the animals belonging to phylum Porifera have water canal system.<\/p>\n<p>Question 25.<br \/>\nWhich is the common physical feature in a bird and a fish?<br \/>\nAnswer:<br \/>\nA bird and a fish both have streamlined body.<\/p>\n<p>Question 26.<br \/>\nName the animal that resembles both the reptiles and mammals.<br \/>\nAnswer:<br \/>\nDuck billed platypus as it lays eggs like reptiles.<\/p>\n<p>Question 27.<br \/>\nName an aerial and an aquatic mammal.<br \/>\nAnswer:<br \/>\nThe only aerial mammal is bat and whale is an aquatic mammal.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 28.<br \/>\nGive an example of a parasitic annelida?<br \/>\nAnswer:<br \/>\nLeech ( Hinidinaria) is the parasitic annelida. It is parasitic on cattle fronl whom it sucks the blood.<\/p>\n<p>Question 29.<br \/>\nName any three animals that show the generation of their body parts.<br \/>\nAnswer:<br \/>\nStar fish regenerates it lost arm, frog regenerates its limb and a hous lizard regenerates it lost tail.<\/p>\n<p>Question 30.<br \/>\nThe animals of which phylum are characterized by the presence of protective hard shell?<br \/>\nAnswer:<br \/>\nIn the phylum Mollusca, all animals posses protective hard shell.<\/p>\n<p>Question 31.<br \/>\nSea horse is a vertebrate. In which class has it been placed li classification?<br \/>\nAnswer:<br \/>\nSea horse has been placed in the classes of Pisces under Oestiochythe<\/p>\n<p>Question 32.<br \/>\nName the three layers present in the embryo of a triploblastic animal.<br \/>\nAnswer:<br \/>\nThe three layers are ectoderm, mesoderm and endoderm.<\/p>\n<p><span style=\"color: #0000ff;\">Short Answer Questions<\/span><\/p>\n<p>Question 1.<br \/>\nWho proposed binomial nomenclature? State its significance.<br \/>\nAnswer:<br \/>\nThe concept of binomial nomenclature was proposed by Carolus Linnaeus It was meant to give the scientific name to an organism for<\/p>\n<ul>\n<li>easy identification of an organism because the first name refers to the gen while the second name is the specific epithet.<\/li>\n<li>maintaining the uniformity of the names worldwide.<\/li>\n<\/ul>\n<p>Question 2.<br \/>\nDraw a labelled diagram of a typical bacterium.<br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23780\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-4.png?resize=326%2C406&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 4\" width=\"326\" height=\"406\" srcset=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-4.png?w=326&amp;ssl=1 326w, https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-4.png?resize=241%2C300&amp;ssl=1 241w\" sizes=\"(max-width: 326px) 100vw, 326px\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 3.<br \/>\nHow are prokaryotes different from eukaryotes?<br \/>\nAnswer:<br \/>\nThe organisms with the prokaryotic cell are characterized by the abs of well defined nucleus and membrane bound cell organelles while those with t eukaryotic cell, plant or animal cell are called eukaryotes.<\/p>\n<p>In five kingdom system, prokaryotes have been placed in kingdom Me while the eukaryotic organisms have been placed in the rest of the four kingdoms.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 4.<br \/>\nWhy are viruses considered to be at the border line of living and non-livings?<br \/>\nAnswer:<br \/>\nViruses are the obligate parasites, they are living only when in body of a living host otherwise, they act as non-living. They can be filtered and crystallized like chemicals.<\/p>\n<p>Question 5.<br \/>\nWhat are protozoa? Give examples.<br \/>\nAnswer:<br \/>\nProtozoa are the eukaryotic unicellular animals which belongs to the kingdom &#8216;Protista&#8217;. These animals are either free living or parasitic. The free living protozoa include amoeba and paramecium while the parasitic protozoa which are the cause of infectious disease to mankind include<\/p>\n<ul>\n<li>Plasmodium, the causative agent of malaria.<\/li>\n<li>Trypanosoma, the causative agent of sleeping sickness.<\/li>\n<li>Entameoba histolytica, the causative agent of amoebiasis.<\/li>\n<\/ul>\n<p>Question 6.<br \/>\nWhy are the saprophytes called the natural cleaners of the environment?<br \/>\nAnswer:<br \/>\nThe saprophytes are called the natural cleaners of the environment because they decompose the dead organic matter of living organisms such as the agricultural wastes and animal excreta into simple inorganic form to allow the recycling of the different nutrients.<\/p>\n<p>Question 7.<br \/>\nName the unicellular fungi with its importance.<br \/>\nAnswer:<br \/>\nOne of the unicellular fungi is yeast. It is commercially an important gradient as it lays the foundation of brewery and bakery industry because of its ability of anaerobically breaking down of sugar, producing the alcohol, ethanol and carbon dioxide. The ethanol is the product used in brewery industries and produced carbon dioxide is used in bakery industry to make the bread or cake soft and spongy.<\/p>\n<p>Question 8.<br \/>\nDifferentiate in the followings:<br \/>\n(a) Monera and Protista<br \/>\n(b) Bryophytes and pteridophytes<br \/>\n(c) Monocots and dicots<br \/>\n(d) Mollusca and echinodermata<br \/>\n(e) Chordata and non-chordata<br \/>\n(f) Cartilaginous and bony fishes<br \/>\n(g) Platyhelminthes and nematoda<br \/>\nAnswer:<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Monera<\/td>\n<td style=\"text-align: center;\" width=\"312\">Protista<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. They have prokaryotic cells.<\/td>\n<td width=\"312\">They have eukaryotic cells.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. They are autotrophic, parasitic or free living.<\/td>\n<td width=\"312\">They are autotrophic, parasitic or free living.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">3. Example: Bacteria, Mycoplasm<\/td>\n<td width=\"312\">Example: Protozoa and algae like chlamydomonas.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>(b) Bryophytes and pteridophytes<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23781\" src=\"https:\/\/i2.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-5.png?resize=710%2C331&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 5\" width=\"710\" height=\"331\" srcset=\"https:\/\/i2.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-5.png?w=710&amp;ssl=1 710w, https:\/\/i2.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-5.png?resize=300%2C140&amp;ssl=1 300w\" sizes=\"(max-width: 710px) 100vw, 710px\" data-recalc-dims=\"1\" \/><\/p>\n<p>(c) Monocots and dicots<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23782\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-6.png?resize=709%2C580&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 6\" width=\"709\" height=\"580\" srcset=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-6.png?w=709&amp;ssl=1 709w, https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-6.png?resize=300%2C245&amp;ssl=1 300w\" sizes=\"(max-width: 709px) 100vw, 709px\" data-recalc-dims=\"1\" \/><\/p>\n<p>(d) Mollusca and echinodermata<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23783\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-7.png?resize=718%2C451&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 7\" width=\"718\" height=\"451\" srcset=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-7.png?w=718&amp;ssl=1 718w, https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-7.png?resize=300%2C188&amp;ssl=1 300w\" sizes=\"(max-width: 718px) 100vw, 718px\" data-recalc-dims=\"1\" \/><\/p>\n<p>(e) Chordata and non-chordata<\/p>\n<table border=\"2\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" width=\"312\">Chordates<\/td>\n<td style=\"text-align: center;\" width=\"312\">Nonchordates<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">1. They show the presence of notochord in any stage of their life.<\/td>\n<td width=\"312\">1. They do not posses notochord in any stage of their life.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">2. Central nervous system is hollow and dorsal.<\/td>\n<td width=\"312\">2. Central nervous system is solid and ventral.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">3. Heart is always ventral.<\/td>\n<td width=\"312\">3. Heart if present is dorsal.<\/td>\n<\/tr>\n<tr>\n<td width=\"312\">4. They have haemoglobin present in red blood cells.<\/td>\n<td width=\"312\">4. They have haemoglobin or any other respiratory pigment present dissolved in blood plasma.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>(f) Cartilaginous and bony fishes<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23784\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-8.png?resize=702%2C192&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 8\" width=\"702\" height=\"192\" srcset=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-8.png?w=702&amp;ssl=1 702w, https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-8.png?resize=300%2C82&amp;ssl=1 300w\" sizes=\"(max-width: 702px) 100vw, 702px\" data-recalc-dims=\"1\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23785\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-9.png?resize=688%2C324&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 9\" width=\"688\" height=\"324\" srcset=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-9.png?w=688&amp;ssl=1 688w, https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-9.png?resize=300%2C141&amp;ssl=1 300w\" sizes=\"(max-width: 688px) 100vw, 688px\" data-recalc-dims=\"1\" \/><\/p>\n<p>(g) Platyhelminthes and Nematoda<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23786\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-10.png?resize=690%2C353&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 10\" width=\"690\" height=\"353\" srcset=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-10.png?w=690&amp;ssl=1 690w, https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-10.png?resize=300%2C153&amp;ssl=1 300w\" sizes=\"(max-width: 690px) 100vw, 690px\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 9.<br \/>\nList some of the important characteristics of protochordates.<br \/>\nAnswer:<br \/>\nThe protochordates are primitive to chordates.<\/p>\n<ul>\n<li>They are triploblastic and bilaterally symmetrical with a coelom.<\/li>\n<li>They are exclusively marine animals.<\/li>\n<li>They posses a notochord at some stage of their life that separates nervous tissue with gut.<\/li>\n<li>They have muscles attached to notochord for easy movement.<br \/>\nExample: Herdmania, Amphixous and Balanglossus.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 10.<br \/>\nWrite the characteristic adaptive features in the followings:<br \/>\n(a) Fishes for swimming in water.<br \/>\n(b) Birds for flying in air.<br \/>\nAnswer:<br \/>\n(a) Fishes are well adapted for swimming in water because they have<\/p>\n<ul>\n<li>streamlined body to reduce friction when swimming in water.<\/li>\n<li>scales to prevent the rotting action of water on body.<\/li>\n<li>have fins to swim and tail fin to steer their motion in water.<\/li>\n<li>have gills for the gaseous exchange.<\/li>\n<li>have swim bladder to change their buoyancy i.e. the depth in water.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-23787\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-11.png?resize=167%2C91&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 11\" width=\"167\" height=\"91\" data-recalc-dims=\"1\" \/><\/p>\n<p>(b) Birds are well adapted for flying because of the presence of<\/p>\n<ul>\n<li>streamlined body with kneeled chest to reduce the air friction in air.<\/li>\n<li>forelimbs modified in form of wings to help bird fly in air.<\/li>\n<li>pneumatic bones to keep the body weight light.<\/li>\n<li>air bladder to change their height in air.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-23788\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-12.png?resize=165%2C133&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 12\" width=\"165\" height=\"133\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 11.<br \/>\nDo all birds fly? If not, give examples.<br \/>\nAnswer:<br \/>\nNo, all birds do not fly. They are few non-flying birds such as<\/p>\n<ul>\n<li>Ostrich of Africa,<\/li>\n<li>Kiwi of Newzealand<\/li>\n<li>Penguin of Antarctica region<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p><span style=\"color: #0000ff;\">Long Answer Questions<\/span><\/p>\n<p>Question 1.<br \/>\nHow have the organisms being classified on the basis of their mode of nutrition?<br \/>\nAnswer:<br \/>\nThe organisms on the basis of their mode of nutrition have been basically classified into two types, autotrophs and heterotrophs. Autotrophs can synthesize their own food like green plants but heterotrophs are organisms that are dependent on others for their nutrition. These organisms based on that how they obtain their food have been further categorized into different types such as:<\/p>\n<p>Saprophytes: Organisms who obtain their nourishment from other living organisms called host. They cause serious damage to the host as they obtain their nourishment such as malaria parasite, leech, ticks, etc.<\/p>\n<p>Symbiotic: Organisms which while living together help each other in gaining the nourishment such as lichen. They are composed of algae and fungi, the fungi absorbs water and minerals while green algae synthesize the food that is equally shared by the both algae and fungi.<\/p>\n<p>Question 2.<br \/>\nState the different characteristic features of monera.<br \/>\nAnswer:<br \/>\nAll members of Monera have the following characteristics:<\/p>\n<ul>\n<li>They lack multicellular body design.<\/li>\n<li>The body cell lack well defined nucleus and membrane bound cell organelles.<\/li>\n<li>Some posses cell wall like bacteria and cyanobacteria while others like mycoplasm lack it.<\/li>\n<li>They can be autotrophic, heterotrophic or symbiotic in their mode of nutrition.<\/li>\n<li>Example: Bacteria, mycoplasma and cyanobacteria like nostoc, anabena and oscillatoria.<\/li>\n<\/ul>\n<p>Question 3.<br \/>\nState the different characteristic features of protista.<br \/>\nAnswer:<br \/>\nThe kingdom Protista include number of eukaryotic unicellular organisms.<\/p>\n<ul>\n<li>They vary in their structure, some have locomotory organs like cila or flagella while others don&#8217;t like amoeba.<\/li>\n<li>They vary in their mode of nutrition, some are autotrophic while others are heterotrophic from holozoic to parasitic. Euglena is the only Protista that shows both autotrophic and heterotrophic mode of nutrition.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-23789\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-13.png?resize=356%2C242&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 13\" width=\"356\" height=\"242\" srcset=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-13.png?w=356&amp;ssl=1 356w, https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-13.png?resize=300%2C204&amp;ssl=1 300w\" sizes=\"(max-width: 356px) 100vw, 356px\" data-recalc-dims=\"1\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23790\" src=\"https:\/\/i2.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-14.png?resize=330%2C184&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 14\" width=\"330\" height=\"184\" srcset=\"https:\/\/i2.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-14.png?w=330&amp;ssl=1 330w, https:\/\/i2.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-14.png?resize=300%2C167&amp;ssl=1 300w\" sizes=\"(max-width: 330px) 100vw, 330px\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 4.<br \/>\nState the chief characteristics of the division Thallophyta with examples.<br \/>\nAnswer:<br \/>\nThe chief characteristics of thallophytes include:<\/p>\n<ul>\n<li>The plant body is in form of individual thallus ire. not differentiated between stem, root and leaf.<\/li>\n<li>They lack vascular system and tissues for conduction of water and food.<\/li>\n<li>They are predominantly aquatic.<\/li>\n<li>Their reproductive organs are single celled.<\/li>\n<li>They are autotrophic like algae, symbiotic like lichens or saprophytic like fungi in their mode of nutrition.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-23791\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-15.png?resize=608%2C285&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 15\" width=\"608\" height=\"285\" srcset=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-15.png?w=608&amp;ssl=1 608w, https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-15.png?resize=300%2C141&amp;ssl=1 300w\" sizes=\"(max-width: 608px) 100vw, 608px\" data-recalc-dims=\"1\" \/><br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-23792\" src=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-16.png?resize=297%2C374&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms 16\" width=\"297\" height=\"374\" srcset=\"https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-16.png?w=297&amp;ssl=1 297w, https:\/\/i0.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/05\/NCERT-Solutions-for-Class-9-Science-Chapter-7-Diversity-in-Living-Organisms-16.png?resize=238%2C300&amp;ssl=1 238w\" sizes=\"(max-width: 297px) 100vw, 297px\" data-recalc-dims=\"1\" \/><\/p>\n<p><img loading=\"lazy\" class=\"alignnone\" src=\"https:\/\/i1.wp.com\/ncertsolutions.guru\/wp-content\/uploads\/2021\/01\/NCERT-Solutions-Guru.png?resize=170%2C17&#038;ssl=1\" alt=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms\" width=\"170\" height=\"17\" data-recalc-dims=\"1\" \/><\/p>\n<p>Question 5.<br \/>\nWhich conventions are followed when writing the scientific name of organism?<br \/>\nAnswer:<br \/>\nWhen writing the scientific name of an organism, the sign conventions followed are:<\/p>\n<ul>\n<li>The name of genus is written first followed by the name of species.<\/li>\n<li>The name of genus starts with capital alphabet while that of species starts with small alphabet.<\/li>\n<li>When printed, it is always written in italics and if written by hand, it is underlined.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>These NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms Questions and Answers are prepared by our highly skilled subject experts to help students while preparing for their exams. Diversity in Living Organisms NCERT Solutions for Class 9 Science Chapter 7 Class 9 Science Chapter 7 Diversity in Living Organisms InText Questions &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/ncertsolutions.guru\/ncert-solutions-for-class-9-science-chapter-7\/\"> <span class=\"screen-reader-text\">NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[6],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v16.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms - NCERT Solutions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ncertsolutions.guru\/ncert-solutions-for-class-9-science-chapter-7\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms - NCERT Solutions\" \/>\n<meta property=\"og:description\" content=\"These NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms Questions and Answers are prepared by our highly skilled subject experts to help students while preparing for their exams. 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