Diversity in the Living World Class 6 Extra Questions and Answers Science Chapter 2

Class 6 Science Chapter 2 Extra Questions Diversity in the Living World

Class 6 Science Chapter 2 Diversity in the Living World Important Extra Questions and Answers

Diversity in the Living World Class 6 Extra Questions Very Short Answer Type

Question 1.
Name two plants that belong to herbs.
Answer:
(i) Wheat
(ii) Grass.

Question 2.
Name two examples of shrubs.
Answer:
Bougainvillea, lemon.

Question 3.
Name two examples of creepers.
Answer:
Mint and goured.

Question 4.
Name the part of a plant which grams below the ground.
Answer:
Root.

Question 5.
What is venation of the leaf ?
Answer:
The arrangement of veins in the lamina or leaf blade is known as venation of the leaf.

Question 6.
What do you mean by biodiversity?
Answer:
Biodiversity means different forms of living organisms or a variety of life forms found in a particular region.

Question 7.
What is the function of root hairs ?
Answer:
Root hairs help the plant to absorb water and dissolved minerals from the soil.

Question 8.
Give names of two plants which have tap root.
Answer:
Mustard and grain.

Question 9.
Name two plants which have fibrous root.
Answer:
Maize plant and wheat plant.

Question 10.
The sunflower plant has recitulate venation its leaves. Which root, it will have?
Answer:
Tap root.

Diversity in the Living World Class 6 Extra Questions Short Answer Type

Question 1.
What are terrestrial habitats. Give examples.
Answer:
Habitats located on the land are called terrestrial habitats. Sandy deserts, mountain regions, grasslands and forests are some terrestrial habitats.

Question 2.
Give two adaptations found in polar bear. How these adaptations help polar bear.
Answer:
The polar bear has a powerful sense of small. The polar bear is a good swimmer. These adaptations help the bear to catch seals for food when ice melts in warmer months.

Question 3.
Mention the adaptation in leaves of hydrophites (water plants).
Answer:
Leaves in submerged plants like Hydrilla are long and thin, so that the strong water currents are not able to tear them apart.

Question 4.
A and B are two types of plants. Plants A has a thin long and weak. Stem which can not stand upright on its own but it readily moves up a nearby support. On the other hand, plant Y is a medium sized plant with a hard and woody stem branching out near the base.
(a) What type of plant is A ? Give one example of such a plant.
(b) What type of plant is Y. Give one example of such a plant.
Answer:
(a) Climber plant, pea plant.
(b) Shrub, rose plant.

Question 5.
A and B are the two types of plants. Plant A has a thin, long and weak stem which cannot stand upright on its own. The plant A does not have tendrils and spreads on the ground. On the other hand, plant Q has a green, soft and delicate stem but it can stand upright on its own.
(a) What type of plant is A ? Name one plant like A.
(b) What type of plant is B. Name one plant like Q.
Answer:
(a) Creeper plant, money plant.
(b) Herb, sunflower plant.

Question 6.
Name two each of large and small animals living in grasslands.
Answer:
Large animals: Dear, leoparts.
Small animals: Mice, snakes.

Question 7.
Given two adaptations in herbivores living in grasslands.
Answer:
(i) Strong teeth for chewing and cutting hard grass.
(ii) Long ears to fallow the movements of predators.

Question 8.
Classify the following as herbs and shrubs mustard, rose, tulsi, radish, sunflower and jasmine.
Answer:
Herbs: Mustard, radish, sunflower.
Shrubs: Tulsi, rose, jasmine.

Question 9.
Give two differences between monocot and dicot plants.
Answer:

Monocot Plant	Dicot Plant
1. Have only one cotyledons in the seed.	1. Have two cotyle­dons in the seed.
2. Leaf shows parallel venation.	2. Leaf shows reticu­late venation

Question 10.
Write any two adaptations of water birds.
Answer:

• They have webbed feet that help them to swim.
• Their beaks are adapted to feed on aquatic organisms such as algae, snails, insects and fish.

Question 11.
The two animals A and B both live in the same habitat forest. The animals ‘ A ‘ is a herbivore. It has eyes on the sides of the head and big ears, It runs very fast. The animals ‘B’ is a carnivore. It has eyes in front of its head. The animal ‘ $B$ ‘ has long, strong and sharp claws in its front legs which it can withdraw inside the toes. It can run very fast.
(a) Name the animals ‘A’ and ‘B’.
(b) What is the advantage to animal ‘A’ of having eyes on the sides of the head ?
(c) What is the advantage to animal ‘B’ of having eyes in front of its head ?
Answer:
(a) (i) Deer, (ii) Lion.
(b) The eyes on the sides of the had enable the deer to see in all directions at the same time. This helps deer to see animals like lion which kill it in all the area around it.
(c) The eyes in front of its head enable the lion to have a correct location of its prey like deer. This helps in catching the prey.

Question 12.
Explain the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere.
Answer:
Plants release oxygen in the atmosphere during the process of photosynthesis. This oxygen is inhaled by the animals for their respirations. During respiration, they release carbon dioxide which is absorbed by plants. Thus oxygen-carbon dioxide cycle goes on in the forest.

Question 13.
How are fish adapted to live in water?
Answer:

• They have a streamlined body to cut through water.
• Their body is covered by scales to prevent decay in water.
• They have fins to move and balance their body.

Question 14.
State three features of pigeon which have made it adaptive to aerial mode of life.
Answer:

• They have a streamlined body to cut through water.
• They forelimbs are modified into wings to help in flying.
• They have strong flight muscle.

Question 15.
How are cactus adapted to survive in a desert?
Answer:
Cactus are adapted to survive in a desert because they have

• No leaves or spiny leaves to prevent water loss through transpiration.
• Stem is modified in such a way that it performs photosynthesis and conserves water.
• Their roots go very deep into the soil for absorbing water.

Question 16.
An animals having a rounded body and small ears has thick fur on its body. fur is also present on its fact and toes. This animal has also a thick layer of fat beneath the skin for insulation. The feet of this animal are quite big in size.
(a) What do you this animal could be ?
(b) Name the habitat of this animal.
(c) How does having a rounded body and small ears help this animal ?
Answer:
(a) Snow leopard.
(b) Mountains having snow.
(c) Having a rounded body and small ears keps the body surface area of snow leopard to a minimum and therefore reduces the heat loss from the body of snow leopard.

Question 17.
Name the types of plants on the basis of habitat.
Answer:

• Hydrophytes: Living in water like lotus, water lily, water hyacinth, water chest nut. These are all aquatic plants.
• Mesophytes : Living on land with sufficient water, like most herbs and trees. These are terrestrial plants.
• Xerophytes : Living on land in dry climate having scarcity of water (as in a desert) like cacti, babool, opuntiaterrestiral plants.

Question 18.
How is lion adopted to the forest habitat?
Answer:

• The lion has long, string and sharp clows in its front legs to catch its prey.
• The lion has eyes in front of its head which enable it to have a correct idea of the location of its prey.
• The lion is light brown in colour. The light brown colour helps the lion to hide in dry grassland when it hunts for prey.

Question 19.
What are the common features of grass lands ?
Answer:
All grasslands have the following features:

• Plenty of grass as food.
• Continuity and openness.
• Locking cover to hide from predators.

Question 20.
Where are mangrove swamps situated? How they are useful?
Answer:
Man grove swamps are situated. Close to the tropical seas. They remain covered with shallow sea-water. The soil is silty and covered with salty water. Mangroves reduce the force of ocean waves. They can save lives and property during natural hazards, such as cyclones and tsunamis.

Diversity in the Living World Class 6 Extra Questions Long Answer Type

Question 1.
How are camels adopted to live in desert?
Answer:

• The feet of the camels have thick, flat large soles which help them in the movements of sand.
• They can live without water for a long time. When water is available, it drinks large amount of water at time.
• They relase very little urine to prevents loss of water.
• Their dung is also dry which also helps to prevent loss of water.
• The long leg of camel helps to keep the body away from the heat of the sand.

Question 2.
How is cactus adapted to survive in a desert?
Answer:
Cacti plants show the following adaptations.

• Their leaves are reduced to scales or spines which reduce the loss of water by transpiration.
• The leaves bear sunken stomata to reduce the rate of transpiration.
• The thick cuticle is found on the stem and leaves for the prevention of loss of water.
• Roots are very long so that water from deep layers of the soil can be absorbed.
• Stem becomes spongy so as to stone water.

Question 3.
What are the various uses/benefits of forests ?
Answer:
The major uses/benefits of forests are given below :

• Purify the air and control air pollution.
• Regulate climate, and help rainfall.
• Help in replenishing ground-water through seepage of rainwater.
• Control floods and prevent floods.
• Provide habitat to a wide variety of plants, animals and insects.

Question 3.
What type of venation is found in the leaves of monocots?
Answer:
Monocots typically have parallel venation in their leaves. In monocotyledonous (monocoat) plants, the veins in the leaves run parallel to each other, forming a pattern where the veins are aligned along the length of the leaf. This is in contrast to dicotyledonous (dicot) plant, which typically have a reticulate (net-like) venation pattern where the veins form a branching network.

Diversity in the Living World Class 6 Picture Based Questions

Look at the figure and answer the following questions :

Question 1.
Identify the figure :
(a) Hibiscus leaf with reticulate venation.
(b) Banana leaf with parallel venation.
(c) Grass leaf with parallel venation.
(d) All of these
Answer:
(d) All of these

Question 2.
What is leaf venation?
(a) Design made by the veins in a leaf
(b) Structure of a leaf
(c) Parallel venation by leaf.
(d) None of these
Answer:
(a) Design made by the veins in a leaf.

Question 3.
What is the relationship between venation and types of roots ?
Answer:

• The plants having leaves with reticulate venation have tap roots.
• The plants having leaves with parallel venation have fibrous roots.

Diversity in the Living World Class 6 Case Based Questions

Chickpea seeds are split into two parts. Each part is called cotyledous. Plants that have seeds with two cotyledons are called dicotyledous (dicots). Maize has a single thin cotyledon : Plants with such seeds are called monocotyledons (monocots).

Question 1.
What is cotyledon?
(a) Plant embryos structures
(b) A seed like structure
(c) A chickpea outer coverage
(d) None of these
Answer:
(a) Plant embryos structures

Question 2.
What are the features of dicots?
(a) Seeds have two cotyledons.
(b) They have taproot system
(c) Leaves with reticulate venation.
(d) All of these
Answer:
(d) All of these

Question 3.
Define monocotylenous or monocots and dicotrs.
Answer:
Plants with seeds having a single cotyledonare called monocotyledonous or monocots. Plants with seeds having two cotyledons are called dicots.

Question 4.
Write the features of monocots.
Answer:

• Seeds have only one cotyledon.
• They have fibrous root system.
• Leaves with parallel venation (straight veins), Example : Cereals, grasses, banana, onion, coconut, lily etc.

Class 6 Science Extra Questions