{"id":13106,"date":"2023-03-29T14:31:55","date_gmt":"2023-03-29T09:01:55","guid":{"rendered":"https:\/\/ncertsolutions.guru\/?p=13106"},"modified":"2023-03-29T17:22:34","modified_gmt":"2023-03-29T11:52:34","slug":"reproduction-in-animals-class-8-extra-questions","status":"publish","type":"post","link":"https:\/\/ncertsolutions.guru\/reproduction-in-animals-class-8-extra-questions\/","title":{"rendered":"Reproduction in Animals Class 8 Extra Questions and Answers Science Chapter 9"},"content":{"rendered":"

Reproduction in Animals Class 8 Extra Questions and Answers Science Chapter 9 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science<\/a> Question bank on a regular basis.<\/p>\n

Class 8 Science Chapter 9 Extra Questions and Answers Reproduction in Animals<\/h2>\n

Extra Questions for Class 8 Science Chapter 9 Reproduction in Animals with Answers<\/strong><\/p>\n

Reproduction in Animals Class 8 Extra Questions Very Short Answer Type<\/h3>\n

Question 1.
\nIndicate whether the following statement is true or false:
\nA zygote is formed as a result of fertilization.
\nAnswer:
\nTrue<\/p>\n

\"Reproduction<\/p>\n

Question 2.
\nIndicate whether the following statement is true or false:
\nAn embryo is made of a single cell.
\nAnswer:
\nFalse<\/p>\n

Question 3.
\nIndicate whether the following statement is true or false:
\nFertilization is necessary even in asexual reproduction.
\nAnswer:
\nFalse<\/p>\n

Question 4.
\nWhat is the name of reproduction in which fusion of male and female gametes takes place ?
\nAnswer:
\nIt is called as sexual reproduction.<\/p>\n

Question 5.
\nWhat does testes produce ?
\nAnswer:
\nThe testes produce the male gametes called sperms.<\/p>\n

Question 6.
\nWhat name is given to the babies born through in vitro fertilisation technique?
\nAnswer:
\nTest-tube baby.<\/p>\n

Question 7.
\nDraw the figure of a sperm.
\nAnswer:
\n\"Reproduction<\/p>\n

Question 8.
\nWhat happens when sperms come in contact with the egg?
\nAnswer:
\nFertilization takes place.<\/p>\n

Question 9.
\nWhat is the other name of a fertilised egg?
\nAnswer:
\nZygote.<\/p>\n

\"Reproduction<\/p>\n

Question 10.
\nWhat is meant by in vitro fertilisation?
\nAnswer:
\nIt means that fertilisation is done outside the body through artificial meAnswer:<\/p>\n

Question 11.
\nWhat is the fertilisation called which takes place inside the female body ?
\nAnswer:
\nIt is called internal fertilisation.<\/p>\n

Question 12.
\nWhich organisms undergo internal fertilisation?
\nAnswer:
\nHumans, cows, goats, dogs, horses, elephants, buffaloes, etc.<\/p>\n

Question 13.
\nWhere does the external fertilisation take place?
\nAnswer:
\nIt takes place in water.<\/p>\n

Question 14.
\nWhat happens after fertilisation?
\nAnswer:
\nThe fertilisation results in the formation of zygote, which begins to develop into an embryo.<\/p>\n

Question 15.
\nWhen does a mother give birth to young one?
\nAnswer:
\nWhen the development of the foetus is complete, the mother gives birth to young one.<\/p>\n

\"Reproduction<\/p>\n

Question 16.
\nWhat name is given to animals which give birth to young ones?
\nAnswer:
\nThey are called viviparous animals.<\/p>\n

Question 17.
\nWhat name is given to the animals which lay eggs?
\nAnswer:
\nThey are called oviparous animals.<\/p>\n

Question 18.
\nDo the young ones in all animals look alike?
\nAnswer:
\nNo, in some animals, the young ones may look very different whereas in other animals the young ones look alike.<\/p>\n

Question 19.
\nGive the different stages in frog\u2019s life-cycle.
\nAnswer:
\nIt is as follows:
\nEgg \u279d tadpole (larva) \u279d adult.<\/p>\n

Question 20.
\nState the stages of life cycle of silkworm.
\nAnswer:
\nIt is as follows:
\nEgg \u279d larva or caterpillar \u279d pupa (cocoon) \u279d adult (moth).<\/p>\n

Question 21.
\nWhat name is given to the drastic change that takes place during the development of an animal?
\nAnswer:
\nMetamorphosis.<\/p>\n

Question 22.
\nState the reproduction in which new individual develops from the buds in Hydra.
\nAnswer:
\nBudding.<\/p>\n

\"Reproduction<\/p>\n

Question 23.
\nWhat is the name of the process of reproduction in Amoeba?
\nAnswer:
\nBinary fission.<\/p>\n

Question 24.
\nWhat name is given to a process in which production of an identical cell or a complete organism is done?
\nAnswer:
\nCloning.<\/p>\n

Question 25.
\nWho performed the cloning process for the first time and where?
\nAnswer:
\nIan Wilmut and his colleagues at Roslin Institute in Edinburgh, Scotland.<\/p>\n

Question 26.
\nWhat is the name of the sheep which was cloned for the first time in the world?
\nAnswer:
\nDolly.<\/p>\n

Question 27.
\nWhen was Dolly bom? When and how she died ?
\nAnswer:
\nIt was born on 5th July 1996 and it died on 14th February 2003 due to a certain lung disease.<\/p>\n

Reproduction in Animals Class 8 Extra Questions Short Answer Type 1<\/h3>\n

Question 1.
\nDefine internal fertilization with two examples.
\nAnswer:
\nFertilization which takes place inside\u00a0the female body is called internal fertilization.\u00a0Examples: Humans, cows, etc.<\/p>\n

\"Reproduction<\/p>\n

Question 2.
\nDefine oviparous animals with two examples.
\nAnswer:
\nThe animals which lay eggs are called oviparous animals. We haye seen the eggs of the birds. These animals lay eggs and then the chicks hatch out of the eggs.\u00a0The examples of oviparous are hen, peacock, crow and parrot, etc.<\/p>\n

Question 3.
\nWhat is uterus ? Is egg a single cell ?
\nAnswer:
\nUterus is the part where development of the baby takes place. Yes, an egg is a single cell.<\/p>\n

Question 4.
\nWhat happens when oviducts of women are blocked?
\nAnswer:
\nIn some women oviducts are blocked. These women are unable to bear babies,\u00a0because sperms cannot reach the egg for\u00a0fertilisation.<\/p>\n

Question 5.
\nAre test-tube babies born in test- tubes?
\nAnswer:
\nNo. Only fertilisation is done in test tubes and then the zygote is placed in the mother\u2019s uterus.<\/p>\n

\"Reproduction<\/p>\n

Question 6.
\nDefine foetus.
\nAnswer:
\nThe stage of the embryo in which all\u00a0the body parts are identifiable is called foetus.<\/p>\n

Question 7.
\nHow long does embryo take to develop into chick?
\nAnswer:
\nThe embryo takes three weeks to develop into a chick. During this period hen sits on the eggs to provide sufficient warmth.<\/p>\n

Question 8.
\nDo tadpoles look different from the adult?
\nAnswer:
\nYes, tadpoles look very different from the adult frog. In a few days, the tadpoles become frogs after complete metamorphosis.<\/p>\n

Question 9.
\nDo human beings also undergo metamorphosis?
\nAnswer:
\nIn human beings, body parts of the young ones similar to the adults are present from the time of birth. So, human beings do not undergo metamorphosis.<\/p>\n

Question 10.
\nGive examples of organisms undergoing asexual reproduction. Name the type of asexual reproduction in them.
\nAnswer:
\nThe organisms undergoing asexual reproduction are (i) Hydra, and (ii) Amoeba. The process of reproduction in Hydra is called budding and in Amoeba is known as binary fission.<\/p>\n

Reproduction in Animals Class 8 Extra Questions Short Answer Type 2<\/h3>\n

Question 1.
\nWrite a short note on sperms.
\nAnswer:
\nSperms are the male gametes produced by testes. Millions of sperms are produced by the testes. Though the sperms are very small in size, each has a head, a middle piece and a tail. Each sperm is a single cell having all the usual cell components. The tail present in the sperm enables it to swim in the oviduct to reach the egg and perform fertilisation process.<\/p>\n

\"Reproduction<\/p>\n

Question 2.
\nDescribe briefly the female reproductive organs.
\nAnswer:
\nThe female reproductive organs are a pair of ovaries, oviducts (fallopian tubes) and the uterus. The ovary produces female gametes called ova (eggs). The egg so produced is a single cell.<\/p>\n

In human beings, a single matured egg is released into the oviduct by one of the ovaries every month. Uterus is the part where development of the baby takes place.<\/p>\n

Question 3.
\nHow does fertilization take place and how is zygote formed? Is zygote the beginning of a new individual?
\nAnswer:
\nWhen the sperms come in contact with the egg, one of the sperms may fuse with the egg. The fusion of the egg and the sperm is known as fertilization, which produce zygote.<\/p>\n

The process of fertilization is the meeting of an egg cell from the mother and a sperm cell from the father. So, the new individual inherits some characters from the mother and some from the father and, therefore, zygote is the beginning of a new individual.<\/p>\n

Question 4.
\nDescribe in vitro fertilization and production of test-tube babies.
\nAnswer:
\nWhen some women are unable to bear babies because of blocked oviduct. In doctors collect freshly released egg and sperms and keep them together for a few hours for in vitro fertilization (fertilisation in test-tube).<\/p>\n

After the zygote develops for about a week, it is placed in the mothers uterus. Complete development takes place in the uterus and the baby is born like any other baby.<\/p>\n

Reproduction in Animals Class 8 Extra Questions Long Answer Type<\/h3>\n

Question 1.
\nRaju has a friend who believes that mother is responsible for the sex of a child because she gives birth to the child.
\n(a) How will Raju correct him using his knowledge of human chromosomes?
\n(b) What are the values shown by Raju?
\nAnswer:
\n(a) No, Raju\u2019s friend has wrong perception as mother is not responsible for the gender of the baby.<\/p>\n

The sex of baby is depends upon the chromosome. In human beings 23rd pair are sex chromosomes named X and Y. All unfertilized egg have one X chromosome. But sperms carry different chromosome X as well as Y.<\/p>\n

If a sperm containing X chromosome fertilizes the egg then the resulting fertilized egg contains two X chromosomes that will give birth to a baby girl whereas if a sperm containing Y chromosome fertilizes the egg then the resulting egg contains one X and one Y chromosome that gives birth to a baby boy. The value shown by Raju is \u2018awareness\u2019.<\/p>\n

\"Reproduction<\/p>\n

Question 2.
\nDescribe the process of fertilisation in humans?
\nAnswer:
\nIn humans, the process of fertilisation is internal. For this millions of sperms from the male are transferred into the female body. The sperms swim in the oviduct with the help of their tails to reach the egg, when they come in contact with the egg, one of the sperms may fuse with the egg and fertilisation is completed. During fertilisation, the nuclei of the sperm and the egg fuse to form a single nucleus and zygote is formed.<\/p>\n

Fertilisation makes the new individual inherits some characteristics from the mother and some from the father.<\/p>\n

Question 3.
\nDraw a labelled diagram of male reproductive organ of human.
\nAnswer:
\n\"Reproduction<\/p>\n

Question 4.
\nDraw a labelled diagram of female reproductive organ of human.
\nAnswer:
\n\"Reproduction<\/p>\n

\"Reproduction<\/p>\n

Question 5.
\nName two animals which undergo metamorphosis. Also name the stages they pass by? Draw a diagram of different stgges of anyone animal.
\nAnswer:
\nTwo animals that undergo metamor\u00adphosis are:
\n(i) Frog.
\n(ii) Silkworm.
\n\"Reproduction<\/p>\n

Different stages of frog\u2019s life-cycle :<\/p>\n

Egg \u279d Tadpole (larva) \u279d Frog (adult).
\nDifferent stages of silkworm\u2019s life-cycle:
\nEgg \u279d Caterpillar \u279d Cocoon (pupa) \u279d Moth (adult).<\/p>\n

Hope the knowledge provided regarding the Reproduction in Animals Class 8 Extra Questions and Answers has helped you to the possible extent. For more info feel free to reach us and we will guide you at the earliest possibility. Stay connected to our site to avail latest updates on Extra Questions for Various Classes instantly.<\/p>\n","protected":false},"excerpt":{"rendered":"

Reproduction in Animals Class 8 Extra Questions and Answers Science Chapter 9 PDF are solved by experts and will guide students in the right direction. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science Question bank on a regular basis. Class 8 Science Chapter 9 Extra …<\/p>\n

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