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

CBSE Class 6 Science

Diversity in the Living World

Important Questions and Answers for revision, school exams, competency-based practice, and NCERT-style preparation.

Class Sixth

Subject Science

Board CBSE

Chapter Diversity in the Living World

Contents

• Section A: Very Short Answer Questions
• Section B: Short Answer Questions
• Section C: Long Answer Questions
• Section D: MCQs
• Section E: Assertion and Reason
• Section F: Case Study Questions
• Section G: Diagram-Based Questions
• Section H: HOTS Questions

Study Tip: Focus on important terms like biodiversity, grouping, venation, taproot, fibrous root, monocot, dicot, habitat, and adaptation.

Section A: Very Short Answer Questions

Question 1: What is biodiversity?

Answer: The variety of plants and animals found in a particular region is called biodiversity.

Question 2: What is grouping?

Answer: Arranging plants and animals on the basis of similarities and differences is called grouping.

Question 3: Name one plant with reticulate venation.

Answer: Hibiscus.

Question 4: Name one plant with parallel venation.

Answer: Banana or grass.

Question 5: What type of root does common grass have?

Answer: Fibrous root.

Question 6: What type of root does mustard have?

Answer: Taproot.

Section B: Short Answer Questions

Question 1: Why should we observe plants and animals without disturbing them?

Answer: We should observe plants and animals without disturbing them because all living creatures have their own role in nature. Disturbing them may harm their habitat, food, shelter, or normal activities.

Question 2: Write two features on the basis of which plants can be grouped.

Answer: Plants can be grouped on the basis of:
1 Height and type of stem — herbs, shrubs, and trees.
2 Leaf venation — reticulate venation and parallel venation.

Question 3: Differentiate between herbs and shrubs.

Herbs	Shrubs
Herbs are usually small plants.	Shrubs are medium-sized plants.
They have soft and green stems.	They have hard, woody stems.
Example: Tomato.	Example: Rose.

Section C: Long Answer Questions

Question 1: Explain the different groups of plants based on height and nature of stem.

Answer:
Plants can be grouped into herbs, shrubs, and trees based on their height, stem type, and branching pattern.

Herbs: Herbs are small plants with soft, green stems. Example: Tomato.
Shrubs: Shrubs are medium-sized plants with hard woody stems. Their branches arise close to the ground. Example: Rose.
Trees: Trees are tall plants with hard, thick, brown, woody stems. Their branches arise higher up on the stem. Example: Mango.

Question 2: Explain the relation between leaf venation, roots, and cotyledons.

Answer:
Dicot plants have two cotyledons, reticulate venation, and taproot system. Examples: Chickpea, mustard, hibiscus.

Monocot plants have one cotyledon, parallel venation, and fibrous root system. Examples: Maize, wheat, grass.

Section D: MCQs

Question 1: The variety of plants and animals found in a region is called:

1. Habitat
2. Biodiversity
3. Venation
4. Adaptation

Correct Answer: B. Biodiversity

Explanation: Biodiversity refers to the variety of plants and animals in a particular region.

Question 2: The pattern of veins on a leaf is called:

1. Cotyledon
2. Venation
3. Habitat
4. Grouping

Correct Answer: B. Venation

Explanation: Venation means the arrangement or pattern of veins on a leaf.

Question 3: Common grass has:

1. Taproot
2. Fibrous root
3. Woody root
4. No root

Correct Answer: B. Fibrous root

Explanation: Grass has many similar-sized thin roots arising from the base of the stem.

Section E: Assertion and Reason

Question 1:
Assertion: Grouping helps us study plants and animals easily.
Reason: Grouping is done on the basis of similarities and differences.

Answer: Both Assertion and Reason are true, and Reason correctly explains the Assertion.

Explanation: Grouping helps us organise living organisms according to common features.

Section F: Case Study Questions

Case Study: Plant Observation During Nature Walk

During a nature walk, students observed three plants. Plant A was tall with a hard, thick, brown stem and branches higher up on the stem. Plant B was medium-sized with many hard woody stems branching close to the ground. Plant C was small with a soft green stem.

Question 1: Identify Plant A.

Answer: Plant A is a tree.

Question 2: Identify Plant B.

Answer: Plant B is a shrub.

Question 3: Identify Plant C.

Answer: Plant C is a herb.

Section G: Diagram-Based Questions

Question 1: Draw and label a taproot system.

Answer: Important labels: main root, side roots, and stem. Example: Mustard plant.

Question 2: Draw and label a fibrous root system.

Answer: Important labels: bunch of thin roots and base of stem. Example: Common grass.

Section H: HOTS Questions

Question 1: A plant has parallel venation. What type of root system is it likely to have?

Answer: It is likely to have a fibrous root system.

Question 2: A plant has two cotyledons in its seed. What type of venation and root system would you expect?

Answer: It would likely have reticulate venation and a taproot system.

Quick Revision Table

Topic	Key Point
Biodiversity	Variety of plants and animals in a region
Grouping	Arranging organisms based on common features
Herbs	Small plants with soft green stems
Shrubs	Medium plants with hard woody stems branching near ground
Trees	Tall plants with hard thick woody stems
Reticulate Venation	Net-like veins, example: hibiscus
Parallel Venation	Parallel veins, example: banana, grass
Taproot	One main root with side roots
Fibrous Root	Bunch of similar thin roots
Dicots	Two cotyledons, taproot, reticulate venation
Monocots	One cotyledon, fibrous root, parallel venation

More Important Questions and Answers

Question 1: Why is biodiversity important?

Answer: Biodiversity is important because every plant and animal has a role in nature. Trees provide food and shelter to birds and animals, while animals help in spreading seeds. Biodiversity helps maintain balance in nature.

Question 2: What is meant by the habitat of an organism?

Answer: The place where a plant or animal naturally lives is called its habitat.

Question 3: Give two examples of terrestrial animals.

Answer: Cow and goat are examples of terrestrial animals because they live on land.

Question 4: Give two examples of aquatic animals.

Answer: Fish and some water insects are examples of aquatic animals because they live in water.

Question 5: What are amphibians?

Answer: Animals that can live both on land and in water are called amphibians. Example: Frog.

Question 6: Why do plants and animals of different regions differ from one another?

Answer: Plants and animals of different regions differ because every region has different environmental conditions such as temperature, water availability, soil, rainfall, and snowfall. Organisms develop special features to survive in those conditions.

Question 7: Why do desert plants often have fleshy stems?

Answer: Desert plants often have fleshy stems because these stems store water and help the plants survive in hot and dry desert conditions.

Question 8: Why do deodar trees have a conical shape?

Answer: Deodar trees grow in cold mountain regions where snowfall is common. Their conical shape and sloping branches help snow slide off easily.

Question 9: Why does a camel of the hot desert have long legs and wide hooves?

Answer: A camel of the hot desert has long legs and wide hooves to walk easily on sand without sinking.

Question 10: How is a camel of a cold desert different from a camel of a hot desert?

Answer: A camel of a cold desert has comparatively shorter height and shorter legs. These features help it walk easily in mountainous regions. A camel of a hot desert has long legs and wide hooves to walk on sandy land.

Question 11: What happens when habitats are damaged?

Answer: When habitats are damaged, plants and animals lose their homes, food, and other resources. This may lead to a loss of biodiversity.

Question 12: Why should we protect biodiversity?

Answer: We should protect biodiversity so that our planet remains full of life. Protecting biodiversity helps plants and animals survive and thrive.

Question 13: What are sacred groves?

Answer: Sacred groves are undisturbed patches of forests protected by local communities. No one is allowed to cut trees, harm animals, or disturb these areas.

Question 14: Why are sacred groves called a community-protected treasure of biodiversity?

Answer: Sacred groves are called a community-protected treasure of biodiversity because they are protected by local communities and contain many different plants, animals, and medicinal plants.

Question 15: Who was Janaki Ammal?

Answer: Janaki Ammal was an Indian botanist who worked to document and preserve India’s rich plant biodiversity. She also played an important role in the Save Silent Valley movement.

Additional Short Answer Questions

Question 1: Why did Dr Raghu ask students to observe nature carefully?

Answer: Dr Raghu asked students to observe nature carefully so that they could notice the variety of plants, animals, smells, sounds, and movements around them without disturbing living creatures.

Question 2: What things should students carry during a nature walk?

Answer: Students should carry a notebook, a pen, and a water bottle during a nature walk.

Question 3: What observations can be recorded about plants during a nature walk?

Answer: Students can record the height of plants, nature of stem, shape and arrangement of leaves, colour and scent of flowers, and other special features.

Question 4: What observations can be recorded about animals during a nature walk?

Answer: Students can record where animals live, what food they eat, how they move, and special features such as wings, legs, fins, or number of legs.

Question 5: Why do different birds have different chirps?

Answer: Different birds have different chirps because each bird has its own unique sound. This is an example of diversity in nature.

Question 6: Why should we not pluck leaves and flowers during a nature walk?

Answer: We should not pluck leaves and flowers because it harms plants. We should respect living things and observe them without disturbing them.

Question 7: What is the difference between a climber and a creeper?

Climber	Creeper
A climber has a weak stem and needs support to grow upward.	A creeper has a weak stem and creeps along the ground.
It climbs with the help of support.	It spreads on the ground.

Question 8: What is the difference between reticulate venation and parallel venation?

Reticulate Venation	Parallel Venation
Veins form a net-like pattern.	Veins run parallel to each other.
Example: Hibiscus.	Example: Banana, grass.
Generally found in dicot plants.	Generally found in monocot plants.

Question 9: What is the difference between monocots and dicots?

Monocots	Dicots
Seeds have one cotyledon.	Seeds have two cotyledons.
Leaves usually have parallel venation.	Leaves usually have reticulate venation.
Roots are usually fibrous.	Roots are usually taproots.
Example: Maize, wheat.	Example: Chickpea, mustard.

Question 10: Why is grouping useful in science?

Answer: Grouping is useful in science because it helps us organise, compare, and study a large variety of plants and animals on the basis of common features.

More MCQs with Answers

Question 1: Which of the following is a habitat?

1. Leaf
2. Forest
3. Stem
4. Flower

Correct Answer: B. Forest

Explanation: A forest is a place where many plants and animals live.

Question 2: Which of the following animals uses fins for movement?

1. Goat
2. Pigeon
3. Fish
4. Ant

Correct Answer: C. Fish

Explanation: Fish use fins to swim in water.

Question 3: Which plant is an example of a shrub?

1. Mango
2. Rose
3. Tomato
4. Grass

Correct Answer: B. Rose

Explanation: Rose is a shrub because it has hard woody stems branching close to the ground.

Question 4: Which plant is an example of a herb?

1. Mango
2. Neem
3. Tomato
4. Banyan

Correct Answer: C. Tomato

Explanation: Tomato is a small plant with a soft green stem.

Question 5: Which one of these is a dicot seed?

1. Maize
2. Wheat
3. Chickpea
4. Grass

Correct Answer: C. Chickpea

Explanation: Chickpea seed has two cotyledons, so it is a dicot seed.

Question 6: Which one of these is a monocot seed?

1. Chickpea
2. Mustard
3. Maize
4. Hibiscus

Correct Answer: C. Maize

Explanation: Maize has one cotyledon, so it is a monocot seed.

Question 7: Which feature helps desert plants store water?

1. Fleshy stem
2. Webbed feet
3. Wings
4. Hooves

Correct Answer: A. Fleshy stem

Explanation: Fleshy stems store water and help desert plants survive.

Question 8: Which feature helps a duck swim?

1. Wide hooves
2. Webbed feet
3. Taproot
4. Conical shape

Correct Answer: B. Webbed feet

Explanation: Webbed feet help ducks push water while swimming.

Question 9: Sacred groves are protected by:

1. Local communities
2. Only animals
3. Only students
4. Only birds

Correct Answer: A. Local communities

Explanation: Sacred groves are protected by local communities to conserve biodiversity.

Question 10: Which of the following is an adaptation of deodar trees?

1. Webbed feet
2. Wide hooves
3. Conical shape and sloping branches
4. Fibrous roots only

Correct Answer: C. Conical shape and sloping branches

Explanation: These features help snow slide off easily.

More Assertion and Reason Questions

Question 1:
Assertion: Sacred groves help protect biodiversity.
Reason: Sacred groves are protected forest patches where plants and animals are not disturbed.

Answer: Both Assertion and Reason are true, and Reason correctly explains the Assertion.

Explanation: Sacred groves protect many plants, animals, and medicinal plants.

Question 2:
Assertion: Biodiversity varies from region to region.
Reason: Different regions have different environmental conditions.

Answer: Both Assertion and Reason are true, and Reason correctly explains the Assertion.

Explanation: Deserts, mountains, forests, and water bodies have different conditions, so their plants and animals differ.

Question 3:
Assertion: Hot desert camels have wide hooves.
Reason: Wide hooves help them walk on sand without sinking.

Answer: Both Assertion and Reason are true, and Reason correctly explains the Assertion.

Explanation: Wide hooves spread the body weight and help camels move on sand.

Question 4:
Assertion: Deodar trees have sloping branches.
Reason: Sloping branches help snow slide off easily.

Answer: Both Assertion and Reason are true, and Reason correctly explains the Assertion.

Explanation: This adaptation helps deodar trees survive in snowy regions.

More HOTS / Application-Based Questions

Question 1: A student finds a seed with one cotyledon. What type of root and leaf venation will the plant most likely have?

Answer: The plant will most likely have fibrous roots and parallel venation.

Explanation: Plants with one cotyledon are monocots, and monocots usually have parallel venation and fibrous roots.

Question 2: A plant has net-like veins on its leaves. What kind of seed and root system is it likely to have?

Answer: It is likely to have a dicot seed and a taproot system.

Explanation: Plants with reticulate venation generally have taproots and two cotyledons.

Question 3: Why should we avoid damaging forests?

Answer: We should avoid damaging forests because forests are habitats for many plants and animals. If forests are damaged, living organisms may lose their homes, food, and resources, leading to loss of biodiversity.

Question 4: Why is a fish not grouped with a goat on the basis of movement?

Answer: A fish swims using fins, while a goat walks and jumps using legs. Since their movements and body parts used for movement are different, they are grouped separately on the basis of movement.

Question 5: Why can the same animal be grouped in more than one way?

Answer: The same animal can be grouped in more than one way because grouping depends on the feature selected. For example, a pigeon can be grouped as a flying animal on the basis of movement and as a tree-living animal on the basis of habitat.