Diversity in the Living World Class 6 Question Answer Science Chapter 2

Diversity in the Living World Class 6 Questions and Answers NCERT Solutions

Class 6 Science Chapter 2 Diversity in the Living World Question Answer

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Question 1.
Here are two types of seeds. What differences do you find among the roots and leaf venation of their plants?

Answer:
Wheat is a monocot seed and has fibrous roots with parallel venation in its leaves whereas kidney beans being dicot have tap roots with reticulate venation in its leaves.

Question 2.
Names of some animals are given below. Group them based on their habitats. Write the names of aquatic animals in the area marked ‘A’ and terrestrial animals in the area marked ‘B’. Enter the names of animals living in both habitats in part ‘ C ‘.
Horse, Dolphin, Frog, Sheep, Crocodile, Squirrel, Whale, Earthworm, Pigeon, Tortoise.

Answer:
Aquatic animals (A) = Dolphin and Whale
Terrestrial animals (B) = Horse, Sheep, Squirrel, Pigeon and Earthworm.
Animals living on land and sea both (C) = Frog, Tortoise and Crocodile .

Question 3.
Manu’s mother maintains a kitchen garden. One day, she was digging out radish from the soil. She told Manu that radish is a kind of root. Examine a radish and write what type of root it is. What type of venation would you observe in the leaves of radish plant?
Answer:
Radish has a tap root system. The type of venation observed in the leaves of radish plant is reticulate venation.

Question 4.
Look at the image of a mountain goat and a goat found in the plains. Point out the similarities and difference between them. What are the reasons for these differences?

Answer:
The similaritie between mountain goat and goat found in the plains are as follows
Both of them are herbivores having hoove and horns. The differences between mountain goat and goat found in plains are as follows.
Mountain goats have strong legs, long and dense fur and special hooves. The strong hooves helps to increase its grip while running up the mountain and the long fur protects them against the cold.
Goats living in plains have smoother hooves and less fur. The smoother hooves help them walk on plains.

Question 5.
Group the following animals into two groups based on any feature other than those discussed in the chapter-cow, cockroach, pigeon, bat, tortoise, whale, fish, grasshopper, lizard.
Answer:
The following animals can be grouped as follows
1. Animals that can fly : Pigeon and Bat.
2. Animals that cannot fly: Cow, Cockroach, Tortoise, Whale, Fish, Grasshopper and Lizard,

Question 6.
As the population grows and people want more comfortable lives, forests are being cut down to meet various needs. How can this affect our surroundings? How do you think we can address this challenge?
Answer:The loss of trees and other vegetation due to cutting down of forests can cause climate change, loss of biodiversity, soil erosion, flooding, etc.
We can address this challenge by the following methods
1. Replanting of trees and, putting a ban on cutting of trees.
2. Implementing regulations and laws to address the severity of cutting down the forest.

Question 7.
Analyse the flowchart. What can be examples of ‘ A ‘ and ‘ B ‘?

Answer:
A: Hibiscus leaves
B: Banana plants

Question 8.
Raj argues with his friend Sanjay that “Gudhal (Hibiscus) plant is a shrub”. What questions can Sanjay ask for clarification?
Answer:
Sanjay can ask the following questions for clarification
1. Is the plant short, medium or tall?
2. Does the plant have a hard or a tender stem?
3. From where do the branches appear?

Question 9.
Based on the information in the table, find out examples of these plants for each group.

(a) What other similarity do plants of group A have?
(b) What other similarity do plants of group B have?
Answer:
On the basis of the information given in the table.
Examples of group A are chickpea, mustard whereas examples of group B are maize, rice, etc.
(a) Plants of group A have reticulate venation.
(b) Plants of group B have parallel venation.

Question 10.
Observe the labelled part of a duck in the picture given below. What differences do you observe in the feet of the duck compared to the other birds? Which activity would the duck be able to perform using this part?

Answer:
Ducks have webbed feet, which are different from the feet of the other birds like pigeon.
Ducks use their webbed feet like paddles to provide more surface to push against the water, which helps them to move through the water.

NCERT Solutions for Class 6 Science Chapter 2 Diversity in the Living World

Intext Questions

Question 1.
Can you think of an example that shows plants and animals are dependent on each other? (Page 14)
Answer:
Plants provide oxygen to the animals to breathe and animals exhale carbon dioxide into the atmosphere, which is used by the plants to prepare their own food.

Question 2.
What is the importance of grouping? (Page 15)
Answer:
Grouping makes it easier to understand and study plants and animals on the basis of their similarities and differences.

Question 3.
How can you group plants as herbs, shrubs and trees? (Page 16)
Answer:
On the basis of theit height and nature of stem, plant can be grouped into herbs, shrubs and trees.

Question 4.
What differences do you see in the veins of leaves in Hibiscus and banana? (Page 17)
Answer:
The leaves of Hibiscus exhibit reticulate venation, i.e. a net-like pattern of veins on both sides of a thick middle vein. On the other hand, the leaves of banana plants exhibit parallel venation in which veins run parallel to each other.

Question 5.
What differences do you see in the roots of mustard plant and common grass? (Page 18)
Answer:
The root of mustard plant exhibits tap root whereas grass exhibits fibrous root.

Question 6.
Do all plants have roots? Are these roots similar? (Page 18)
Answer:
Generally, all plants have roots. However, these roots are not always similar. As roots are mainly of two types, i.e. tap root and fibrous root.

Question 7.
What kind of roots do grasses have? (Page 19)
Answer:
Grasses usually have a fibrous root system.

Question 8.
Is there any relation between the type of leaf venation and the type of root of the same plant? How do we find this out? (Page 19)
Answer:
Yes, generally plants with reticulate venation have tap root system while those with parallel venation have fibrous roots. We can find this out by carefully observing the leaves and roots of the plants.

Question 9.
Is there any relation among the seed of a plant, types of root and leaf venation? Are all seeds similar? (Page 20)
Answer:
Yes, there is a relation between seed of a plant, types of root and leaf venation. No, not all seeds are similar. As based on the number of cotyledons, they can be of two types, i.e. dicots and monocots.

Question 10.
What relation do you observe among leaf venation, root types and the number of cotyledons in seeds of a plant? (Page 20)
Answer:
Dicot plants have reticulate venation and a tap root system, while monocot plants have parallel venation and a fibrous root system.

Question 11.
How can we group animals based on their movements? (Page 22)
Answer:
Animals can be grouped on the basis of types of movement they show and the body part they use for the movement.

Question 12.
Does the movement of animals like fish and goat depend upon their surroundings? (Page 23)
Answer:
Yes, the movement of these animals depends upon their surroundings. Fish live in water and have streamlined bodies and fins for movement in water. On the other hand, goats live in grassy areas and move with the help of legs.

Question 13.
Why does the biodiversity of a region vary from that of another? (Page 25)
Answer:
The reasons for variation in biodiversity are complex but they include natural and man-made causes. Different environmental conditions such as temperature, humidity, etc. will favour one form of plant or animal over another, thus, creating differences in biodiversity.

Question 14.
What are differences observed between a camel living in hot desert of Rajasthan and a camel living in cold desert of Ladakh? What advantages do these differences provide to these camels? (Page 25)
Answer:
The camel in hot desert has long legs with wide hooves that helps it to walk on the sandy desert without sinking into the sand. In contrast, the height and legs of camels in a cold desert are shorter that allow them to walk easily in mountainous regions.

Camels in hot desert have one hump that helps them to survive during scarcity of food while camels in cold desert have two humps. The two humps shrink in late winters as there is not much food available there. Camels living in colder areas grow long hair from head to neck to survive the cold winters.

Question 15.
What features can help camels to survive in the desert? (Page 26)
Answer:
Other than long legs, wide hooves and presence of hump, camels survive in the desert by excreting small amounts of urine, excreting dry dung and by not sweating. This helps them conserve water from their bodies and survive in the desert without drinking water.

Question 16.
What are the different ways you can group plants and animals based on their habitats? (Page 27)
Answer:
Refér to page no. 7 and 8.

Question 17.
What would happen if the habitat of a plant or an animal is damaged? What would happen if a goat does not get grass to eat? Can a fish survive without water? (Page 28)
Answer:
The destruction of habitat would make species of plants and animals go extinct, which would affect the survival of other species. If a goat does not get grass to eat, it could die.
No, fish cannot survive without water as water is essential for its survival.

Let’s Investigate

Activity 1 (Page 11)

Aim : To observe and compare characteristics of different plants.

Procedure :

• Take a stroll in a garden and observe different plants.
• Compare the plant on the basis of stem, leaves and flowers.
• Write down your observation in the observation table

Observation :

Conclusion :

Different plants show variation in characteristics such as stem, structure, shape and arrangement of leaves, colour of flower and more.

Viva Questions :

1. Name any one type of arrangement generally found in leaves.
2. Name two more plants that are usually found in a garden.

Activity 2 (Page 12)

Aim : To observe and compare characteristics of different animals.

Procedure :

• Take a stroll in a garden and observe different insects, birds and other animals.
• Compare the animals on the basis of place where they live, food they eat and type of movement they show.
• Write down your observation in the observation table.

Observation :

Conclusion The animals show variation in different characters like the places they live, food they eat, the way they move around.

Viva Questions :

1. Name some more animals that have similar food preferences like cow.
2. Compare crow and ant on the basis of the place they live and food they eat.

Activity 3 (Page 17)

Aim : To study the different types of venation in plants.
Requirement Leaves of different plants.

Procedure :

• Visit a nearby park and collect fallen leaves of different plants like lemon, banana, grass, wheat and rice.
• Now carefully observe the venation of the collected leaves.
• Take one leaf at a time and note down your observation in the table below.

Observation :

Conclusion :

Plants show variation in the type of venation pattern in their leaves.

Viva Questions :

1. Give two more examples of plants that show parallel venation.
2. A net like pattern of veins on both sides of the middle vein indicates what kind of venation?

Activity 4 (Page 18)

Aim : To observe and compare roots of different herbs.
Requirement Khurpi (trowel) and water.

Procedure :

• Visit a garden/school yard with your friends.
• Carefully dig out some different herbs (like mustard and common grass) using a Khurpi without damaging the roots. To do this, you may wet the soil and loosen it.
• Then, wash the roots with water.
• Observe these roots carefully.
• After observing, replant these herbs so that they may continue to thrive and grow.

Observation :

1. The roots of mustard consists of one main root and small side roots arising from it.
2. The roots of grass appear as a bunch of similar-sized thin roots arising from the base of stem.

Conclusion :

Mustard plants have deep tap roots, while grasses have fibrous roots.

Viva Questions :

1. How does the root system of a mustard plant differ from that of grasses?
2. Name any other plant with tap root system.

Activity 5 (Page 19)

Aim : To investigate the relation between leaf venation and the type of root in the same plant.
Requirement Saplings of any commonly found plants.

Procedure :

• Visit a nearby nursery or your school nursery to collect saplings of any five commonly found plants like lemon grass, marigold, sadabahar (periwinkle), etc.
• Now carefully observe the roots of the saplings along with the venation of the leaves.
• Now note down your observations carefully in the table.

Observation :

Conclusion :

Generally, plants with reticulate venation have tap roots while those with parallel venation have fibrous root system.

Viva Questions :

1. Wheat is an example of a plant with fibrous roots. What type of venation is expected in it?
2. Give one example of each, i.e. plant with tap roots and plant with reticulate venation.

Activity 6 (Page 20)

Aim : To observe and compare the seeds of chickpea and maize.
Requirement Seeds of chickpea and maize, water, forceps and bowl.

Procedure :

1. Soak the seeds of chickpea and maize in two different bowls, full of water respectively, for two or three days.
2. Take the seeds out by straining the excess water.
3. Now, remove the seed coat of a chickpea with the help of foreceps.
4. Observe the structufe of chickpea and maize seed.

Observation :

Chickpea seeds split into two parts, while the seeds of maize do not split.

Conclusion :

Chickpea is a dicotyledon plant, while maize is a monocotyledon plant.

Viva Questions :

1. How many cotyledons does bean seed have?
2. Give two other examples of dicot and monocot plants.

Activity 7 (Page 22)

Aim : To investigate the different ways in which various animals move and the body parts they use for movement.
Requirement Pencil, pen and notebook.

Procedure :

• Go out for a walk in a park and observe different ways in which various insects, birds and animals move.
• Notice the body parts different organisms use for their movement.
• Now, record your observations in the table.

Observation :

Conclusion :

Different animals have different ways of movement using different body parts.

Viva Questions :

1. Name any two animals that uses legs and wings for the movement respectively.
2. Name an animal that crawls as a mode of movement.

Curiosity Class 6 Science Book Solutions