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Chapter 2. Diversity in the Living World

Chapter Review

Chapter 2. Diversity in the Living World

This chapter introduces students to the amazing diversity of plants and animals found around us. It explains how living organisms can be grouped based on their similarities and differences through careful observation. The chapter also describes biodiversity, different groups of plants, leaf venation, types of roots, monocot and dicot plants, habitats, adaptations, and the importance of conserving biodiversity. :contentReference[oaicite:0]{index=0}

Chapter Review

This section presents all the important concepts, scientific terms, definitions, exam-oriented facts, and quick revision points from the chapter in a simple and systematic manner.

Chapter Introduction

• A great variety of plants and animals are found in nature.
• Living organisms have many similarities as well as differences.
• Plants and animals are grouped based on their observable characteristics.
• Biodiversity is essential for maintaining ecological balance.
• Careful observation is the first step in studying the living world.

Learning Objectives

• Understand the meaning of biodiversity.
• Identify different types of plants and animals.
• Learn how living organisms are grouped based on similarities and differences.
• Classify plants into different groups.
• Understand leaf venation, root systems, and cotyledons.
• Develop awareness about nature conservation and biodiversity.

Important Points

• The variety of living organisms found in a region is called biodiversity.
• Grouping helps us study plants and animals more easily.
• Plants are classified into herbs, shrubs, trees, climbers, and creepers.
• Leaves show two main types of venation—reticulate and parallel.
• The two main types of roots are taproot and fibrous root.
• Plants with reticulate venation generally have taproots.
• Plants with parallel venation generally have fibrous roots.
• Dicot plants usually have two cotyledons, while monocot plants have one cotyledon.
• Animals can be grouped based on habitat, food habits, movement, and body features.
• Different habitats support different kinds of plants and animals.
• Adaptations help living organisms survive in their habitats.
• Conservation of biodiversity is essential for a healthy environment.

Important Definitions

• Biodiversity: The variety of plants, animals, and other living organisms found in a particular region.
• Classification: The process of grouping living organisms based on their similar characteristics.
• Herb: A small plant with a soft, green stem.
• Shrub: A medium-sized woody plant with branches arising near the ground.
• Tree: A tall plant with a thick, hard, woody stem.
• Climber: A plant that grows upward with the support of another object.
• Creeper: A plant that spreads along the ground.
• Leaf Venation: The arrangement of veins in a leaf.
• Taproot: A root system with one main root and smaller side roots.
• Fibrous Root: A root system consisting of many thin roots of similar size.
• Monocot Plant: A plant whose seed contains one cotyledon.
• Dicot Plant: A plant whose seed contains two cotyledons.
• Habitat: The natural place where an organism lives.
• Adaptation: A special feature that helps an organism survive in its habitat.

Important Scientific Terms

• Biodiversity
• Classification
• Observation
• Herb
• Shrub
• Tree
• Climber
• Creeper
• Reticulate Venation
• Parallel Venation
• Taproot
• Fibrous Root
• Monocot
• Dicot
• Habitat
• Adaptation
• Aquatic
• Terrestrial

Remember Facts

• Biodiversity represents the richness of living organisms in a region.
• All living organisms are directly or indirectly connected with one another.
• Reticulate venation is generally associated with taproots.
• Parallel venation is generally associated with fibrous roots.
• Different habitats support different kinds of biodiversity.
• Adaptations enable organisms to survive in their surroundings.
• Protecting biodiversity is the responsibility of every individual.

Common Mistakes

• Confusing herbs, shrubs, and trees.
• Unable to distinguish between taproot and fibrous root systems.
• Confusing reticulate venation with parallel venation.
• Thinking biodiversity means only the number of organisms.
• Confusing monocot plants with dicot plants.

Exam Highlights

• Definition of biodiversity.
• Classification of plants.
• Difference between herbs, shrubs, and trees.
• Difference between taproot and fibrous root.
• Difference between monocot and dicot plants.
• Types of leaf venation.
• Importance of classification.
• Meaning of habitat and adaptation.
• Importance of biodiversity conservation.

Quick Revision

• Living organisms show great diversity.
• Classification is based on similarities and differences.
• Plants are grouped into herbs, shrubs, trees, climbers, and creepers.
• Leaves have two main types of venation.
• Roots are mainly of two types.
• Plants are also classified as monocots and dicots.
• Habitats influence the biodiversity of a region.
• Adaptations help organisms survive.
• Biodiversity must be conserved.

Chapter Summary

This chapter explains the diversity of living organisms, methods of grouping plants and animals, plant classification, leaf venation, root systems, monocot and dicot plants, habitats, adaptations, and biodiversity conservation. It develops observation skills, scientific thinking, and awareness about protecting the rich diversity of life on Earth.

Chapter 2. Diversity in the Living World

NCERT Text Book Questions With Answers

Chapter 2. Diversity in the Living World

NCERT Textbook Exercise

This section contains the solutions to the questions given under "Let us enhance our learning" in the NCERT textbook.

Question 1

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

Answer:

Seed	Type of Root	Leaf Venation
Wheat	Fibrous root	Parallel venation
Kidney bean	Taproot	Reticulate venation

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’, terrestrial animals in ‘B’ and animals living in both habitats in ‘C’.

Horse, Dolphin, Frog, Sheep, Crocodile, Squirrel, Whale, Earthworm, Pigeon, Tortoise

Answer:

A (Aquatic)	B (Terrestrial)	C (Both Aquatic and Terrestrial)
Dolphin, Whale	Horse, Sheep, Squirrel, Earthworm, Pigeon	Frog, Crocodile, Tortoise

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 is a modified taproot. Since it is a dicot plant, its leaves show reticulate venation.

Question 4

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

Answer:

Similarities:

• Both are mammals.
• Both have four legs, horns and a body covered with hair.
• Both are herbivorous animals.

Differences:

• Mountain goats have thick fur, while goats living in the plains have comparatively short and thin hair.
• Mountain goats have strong legs and broad hooves for climbing rocky slopes.
• Plain goats have comparatively slimmer legs suitable for walking on flat land.

Reason:

These differences are adaptations that help them survive in their respective habitats.

Chapter 2. Diversity in the Living World

Extra Questions Examination Based

Chapter 2. Diversity in the Living World

The following additional questions are designed according to the latest CBSE pattern. They cover important concepts of the chapter and help students strengthen their understanding beyond the NCERT textbook.

Additional Important Questions with Answers

Very Short Answer Questions (1 Mark)

Question 1. What is biodiversity?

Answer: Biodiversity is the variety of living organisms found in a particular region.

Question 2. What is classification?

Answer: Classification is the process of grouping living organisms based on their similarities.

Question 3. What is a herb?

Answer: A herb is a small plant with a soft, green stem.

Question 4. Name the two main types of leaf venation.

Answer: Reticulate venation and parallel venation.

Question 5. Name the two main types of roots.

Answer: Taproot and fibrous root.

Question 6. Which type of root is usually found in wheat?

Answer: Fibrous root.

Question 7. Which type of venation is commonly found in mango leaves?

Answer: Reticulate venation.

Question 8. What is a climber?

Answer: A climber is a plant that needs support to grow upward.

Question 9. What is a creeper?

Answer: A creeper is a plant that grows along the ground.

Question 10. What is a habitat?

Answer: A habitat is the natural place where an organism lives.

Question 11. Name one aquatic animal.

Answer: Dolphin.

Question 12. Name one terrestrial animal.

Answer: Horse.

Question 13. Name one animal that lives both on land and in water.

Answer: Frog.

Question 14. What is a dicot plant?

Answer: A dicot plant has two cotyledons in its seed.

Question 15. What is a monocot plant?

Answer: A monocot plant has one cotyledon in its seed.

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Short Answer Questions (2 Marks)

Question 1. Why do scientists classify living organisms?

Answer: Scientists classify living organisms to make their identification and study easier. Classification also helps us understand similarities and differences among organisms.

Question 2. Differentiate between herbs and shrubs.

Answer:

• Herbs have soft, green stems.
• Shrubs have hard, woody stems with many branches arising near the base.

Question 3. Differentiate between climbers and creepers.

Answer:

• Climbers grow upward with support.
• Creepers spread along the ground without support.

Question 4. What is the relationship between leaf venation and root system?

Answer: Plants with reticulate venation generally have taproots, while plants with parallel venation generally have fibrous roots.

Question 5. Why is biodiversity important?

Answer: Biodiversity helps maintain ecological balance and ensures the survival of different living organisms.

Question 6. Write two characteristics of trees.

Answer:

• Trees have tall, thick, woody stems.
• They usually have many branches at the top.

Question 7. How are aquatic animals different from terrestrial animals?

Answer: Aquatic animals live in water, whereas terrestrial animals live on land. Their body structures are adapted to their habitats.

Question 8. Why do mountain goats have thick fur?

Answer: Thick fur protects mountain goats from cold weather and helps them survive in mountainous regions.

Question 9. What are adaptations?

Answer: Adaptations are special features that help organisms survive in their habitats.

Question 10. Give two examples each of monocot and dicot plants.

Answer:

• Monocots: Wheat, Maize
• Dicots: Bean, Mango

Chapter 2. Diversity in the Living World

40 Important MCQs with Answers

Chapter 2. Diversity in the Living World

This section contains 40 important multiple-choice questions (MCQs) based on the latest CBSE syllabus. Attempt all the questions first and then check your answers from the Answer Key given at the end.

40 Important MCQs with Answer Key

Question 1. What is biodiversity?

• (A) Variety of living organisms
• (B) Number of trees
• (C) Number of animals
• (D) Variety of rocks

Question 2. Classification of living organisms is done mainly to—

• (A) increase their number
• (B) make their study easier
• (C) change their habitat
• (D) protect only plants

Question 3. Which of the following is a herb?

• (A) Mango
• (B) Rose
• (C) Mint
• (D) Banyan

Question 4. Which plant is a shrub?

• (A) Rose
• (B) Wheat
• (C) Grass
• (D) Banana

Question 5. Which of the following is a tree?

• (A) Mango
• (B) Pea
• (C) Pumpkin
• (D) Spinach

Question 6. A climber grows—

• (A) under water
• (B) with support
• (C) on the ground only
• (D) inside soil

Question 7. A creeper—

• (A) grows with support
• (B) grows underground
• (C) spreads on the ground
• (D) grows in water only

Question 8. Which type of venation is found in mango leaves?

• (A) Parallel
• (B) Reticulate
• (C) Circular
• (D) Networkless

Question 9. Wheat leaves show—

• (A) Reticulate venation
• (B) Parallel venation
• (C) No venation
• (D) Spiral venation

Question 10. Taproots are generally found in—

• (A) Dicot plants
• (B) Monocot plants
• (C) Mosses
• (D) Ferns

Question 11. Fibrous roots are commonly found in—

• (A) Wheat
• (B) Mango
• (C) Bean
• (D) Pea

Question 12. A monocot seed contains—

• (A) One cotyledon
• (B) Two cotyledons
• (C) Three cotyledons
• (D) No cotyledon

Question 13. A dicot seed contains—

• (A) One cotyledon
• (B) Two cotyledons
• (C) Three cotyledons
• (D) Four cotyledons

Question 14. Which is an aquatic animal?

• (A) Whale
• (B) Horse
• (C) Goat
• (D) Camel

Question 15. Which is a terrestrial animal?

• (A) Dolphin
• (B) Horse
• (C) Octopus
• (D) Shark

Question 16. Frog lives—

• (A) only in water
• (B) only on land
• (C) both on land and in water
• (D) on trees only

Question 17. The natural place where an organism lives is called its—

• (A) Habitat
• (B) Shelter
• (C) House
• (D) Nest

Question 18. Adaptations help organisms to—

• (A) change colour only
• (B) survive in their habitat
• (C) become larger
• (D) reproduce faster

Question 19. Which scientist mentioned in the chapter made significant contributions to botany?

• (A) Janaki Ammal
• (B) C. V. Raman
• (C) Jagadish Chandra Bose
• (D) Homi Bhabha

Question 20. The Silent Valley Movement was started to protect—

• (A) Biodiversity
• (B) Rivers
• (C) Mountains
• (D) Deserts

Question 21. Plants with reticulate venation generally have—

• (A) Taproots
• (B) Fibrous roots
• (C) No roots
• (D) Aerial roots only

Question 22. Plants with parallel venation usually have—

• (A) Taproots
• (B) Fibrous roots
• (C) Prop roots
• (D) Breathing roots

Question 23. Which of the following is a creeper?

• (A) Pumpkin
• (B) Grapevine
• (C) Money plant
• (D) Pea

Question 24. Which of the following is a climber?

• (A) Pumpkin
• (B) Watermelon
• (C) Grapevine
• (D) Bottle gourd on the ground

Question 25. The study of living organisms becomes easier through—

• (A) Classification
• (B) Pollution
• (C) Farming
• (D) Irrigation

Question 26. Which plant has fibrous roots?

• (A) Rice
• (B) Mango
• (C) Mustard
• (D) Bean

Question 27. Which plant has taproots?

• (A) Wheat
• (B) Rice
• (C) Gram
• (D) Maize

Question 28. Which is NOT a woody plant?

• (A) Herb
• (B) Shrub
• (C) Tree
• (D) None of these

Question 29. The main purpose of observing living organisms is to—

• (A) classify them
• (B) disturb them
• (C) collect them
• (D) remove them

Question 30. Biodiversity is important because it—

• (A) maintains ecological balance
• (B) increases pollution
• (C) reduces rainfall
• (D) destroys habitats

Question 31. Which animal has adaptations for climbing mountains?

• (A) Mountain goat
• (B) Camel
• (C) Dolphin
• (D) Whale

Question 32. Which characteristic is used for classifying plants?

• (A) Stem
• (B) Roots
• (C) Leaves
• (D) All of these

Question 33. Which of the following shows reticulate venation?

• (A) Mango
• (B) Wheat
• (C) Rice
• (D) Maize

Question 34. Which of the following shows parallel venation?

• (A) Banana
• (B) Mango
• (C) Rose
• (D) Bean

Question 35. Which one is correctly matched?

• (A) Herb – Soft stem
• (B) Tree – Soft stem
• (C) Shrub – Climber
• (D) Creeper – Woody trunk

Question 36. Which of the following helps in conserving biodiversity?

• (A) Protecting forests
• (B) Cutting trees
• (C) Hunting animals
• (D) Polluting rivers

Question 37. Which is an example of a dicot plant?

• (A) Bean
• (B) Wheat
• (C) Rice
• (D) Maize

Question 38. Which is an example of a monocot plant?

• (A) Wheat
• (B) Gram
• (C) Pea
• (D) Mango

Question 39. The chapter mainly encourages students to develop—

• (A) Observation skills
• (B) Memorisation only
• (C) Drawing skills only
• (D) Writing skills only

Question 40. Every living organism plays an important role in maintaining—

• (A) Ecological balance
• (B) Traffic rules
• (C) Weather forecast
• (D) Population growth

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Answer Key

1. A
2. B
3. C
4. A
5. A
6. B
7. C
8. B
9. B
10. A
11. A
12. A
13. B
14. A
15. B
16. C
17. A
18. B
19. A
20. A
21. A
22. B
23. A
24. C
25. A
26. A
27. C
28. A
29. A
30. A
31. A
32. D
33. A
34. A
35. A
36. A
37. A
38. A
39. A
40. A