Last Updated on April 6, 2025 by XAM CONTENT
Looking for well-structured and exam-ready extra questions for Class 6 Science? You’re in the right place! On this page, you’ll find a curated set of very short answer, short answer, and long answer questions from Chapter 2 of the NCERT textbook, along with MCQs, assertion-reason, passage-based, and competency-based questions — all with accurate and student-friendly answers.
| Question Type | Number of Questions |
|---|---|
| Very Short Answer Type (1 mark) | 15 Questions |
| Short Answer Type (2–3 marks) | 10 Questions |
| Long Answer Type (4–5 marks) | 5 Questions |
| Multiple Choice Questions (MCQs) | 10 Questions |
| Assertion-Reason Questions | 2 Questions |
| Passage-Based Questions | 6 Questions |
| Match the Column / Table-Based | 2 Questions |
Diversity in the Living World Extra Questions for Class 6 Science
Very Short Answer Questions (1 Mark Each)
Q1: What is biodiversity?
Ans: Biodiversity refers to the variety of life forms found on Earth.
Q2: Name one characteristic of monocots.
Ans: Monocots have one cotyledon in their seeds.
Q3: What type of root does a dicot have?
Ans: Dicots usually have a taproot system.
Q4: What is the function of roots?
Ans: Roots anchor the plant and absorb water and minerals.
Q5: Name a plant with fibrous roots.
Ans: Wheat.
Q6: Which plant group has a soft green stem?
Ans: Herbs.
Q7: What is a taproot?
Ans: A thick central root with smaller branches.
Q8: Give one example of a producer.
Ans: Grass.
Q9: What is the role of leaves?
Ans: Leaves prepare food through photosynthesis.
Q10: What kind of venation is seen in banana leaves?
Ans: Parallel venation.
Q11: Which organ in plants stores food?
Ans: Roots or stems can store food.
Q12: Name one adaptation in cactus for desert life.
Ans: Thick stems to store water.
Q13: What is parallel venation?
Ans: Veins run parallel to each other.
Q14: Which part of the plant is responsible for reproduction?
Ans: Flower.
Q15: Name one aquatic plant.
Ans: Lotus.
Short Answer Questions (2–3 Marks Each)
Q1: Differentiate between taproot and fibrous root systems.
Ans: Taproot has a main central root with smaller lateral roots. Fibrous roots consist of many thin roots of equal size emerging from the base of the stem.
Q2: What is the importance of leaf venation in classification?
Ans: Leaf venation helps classify plants into monocots (parallel) and dicots (reticulate).
Q3: Explain how cactus survives in desert conditions.
Ans: Cactus has spines instead of leaves to reduce water loss, and thick stems to store water.
Q4: What is the significance of classifying plants?
Ans: Classification helps in studying, identifying, and understanding similarities among plants.
Q5: Why is biodiversity important?
Ans: It maintains ecological balance and provides oxygen, food, and medicine.
Q6: What is meant by adaptation? Give one example.
Ans: Adaptation is a feature that helps an organism survive. E.g., streamlined body in fish for swimming.
Q7: Write two features of shrubs.
Ans: Shrubs have woody stems and are medium-sized.
Q8: Why do aquatic plants have air spaces in their tissues?
Ans: Air spaces help them float and exchange gases.
Q9: Give two differences between monocots and dicots.
Ans: Monocots: one cotyledon, parallel venation; Dicots: two cotyledons, reticulate venation.
Q10: How does grouping help in understanding biodiversity?
Ans: Grouping helps to simplify study and track similarities, differences, and evolutionary traits.
Long Answer Questions (4–5 Marks Each)
Q1: Describe the concept of biodiversity and explain its significance in maintaining ecological balance.
Ans: Biodiversity is the variety of life on Earth including plants, animals, and microorganisms. It contributes to ecological balance by ensuring nutrient cycling, supporting food chains, and maintaining stability. It also provides resources like food, medicine, and raw materials.
Q2: Explain the role of grouping in understanding biodiversity and how it supports conservation.
Ans: Grouping simplifies biodiversity study, shows evolutionary relationships, helps identify endangered species, and guides conservation efforts by focusing on vulnerable species and habitats.
Q3: Compare the characteristics of herbs, shrubs, and trees with examples.
Ans: Herbs: small, soft green stems (e.g., spinach). Shrubs: woody, bushy, medium height (e.g., rose). Trees: tall, thick woody stem (e.g., mango).
Q4: How do leaf types and venation patterns help classify plants? Give examples.
Ans: Leaf venation helps differentiate monocots and dicots. Banana has parallel venation (monocot), and mango has reticulate venation (dicot). It aids in grouping and understanding plant structure.
Q5: Discuss how various habitats affect the features of plants and animals with examples.
Ans: Deserts lead to features like spines and water storage (e.g., cactus). Aquatic plants have air spaces (e.g., lotus). Mountain plants have conical shapes (e.g., pine). Features develop to suit habitat conditions.
Q1. Which of the following best defines biodiversity?
(a) The variety of life in any region of Earth
(b) The number of different species in a particular area
(c) The interaction between living organisms and their environment
(d) All of the above
Ans: (d) All of the above
Q2. Which of the following is NOT a component of biodiversity?
(a) Genetic diversity
(b) Species diversity
(c) Ecosystem diversity
(d) Cultural diversity
Ans: (d) Cultural diversity
Q3. The primary reason for the decline in biodiversity is
(a) Climate change
(b) Habitat destruction
(c) Overexploitation of resources
(d) All of the above
Ans: (d) All of the above
Q4. Which of the following is an example of a producer in an ecosystem?
(a) Lion
(b) Grass
(c) Eagle
(d) Mushroom
Ans: (b) Grass
Q5. The process by which plants convert sunlight into energy is called:
(a) Respiration
(b) Photosynthesis
(c) Transpiration
(d) Decomposition
Ans: (b) Photosynthesis
Q6. Which of the following is NOT a threat to biodiversity?
(a) Reforestation
(b) Pollution
(c) Overhunting
(d) Habitat fragmentation
Ans: (a) Reforestation
Q7. The interconnectedness of different species in an ecosystem is essential for:
(a) Growth of population
(b) Conservation of plants
(c) Ecological balance
(d) Classification
Ans: (c) Ecological balance
Q8. Which of the following is an adaptation for desert life?
(a) Thick fleshy leaves
(b) Spines
(c) Hairy stems
(d) All of the above
Ans: (d) All of the above
Q9. Which of the following plants has fibrous roots?
(a) Rose
(b) Wheat
(c) Pea
(d) Mango
Ans: (b) Wheat
Q10. Which characteristic helps aquatic plants to float?
(a) Hollow stem
(b) Waxy coating
(c) Air spaces in tissues
(d) Long roots
Ans: (c) Air spaces in tissues
Assertion and Reasoning Questions
Directions:
For each of the questions below, choose the correct option:
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false and R is also false
Q1. Assertion (A): Rainforests have high biodiversity.
Reason (R): Rainforests provide a stable and warm climate with abundant rainfall.
Answer: (a) Both A and R are true and R is the correct explanation of A
Q2. Assertion (A): Streamlined body helps animals swim and fly efficiently.
Reason (R): Only fishes have streamlined bodies.
Answer: (c) A is true but R is false
Q3. Assertion (A): Cactus has spines instead of leaves.
Reason (R): Spines help cactus perform photosynthesis.
Answer: (c) A is true but R is false
Q4. Assertion (A): Trees are grouped separately from shrubs.
Reason (R): Trees are tall with hard woody stems, while shrubs are shorter and bushier.
Answer: (a) Both A and R are true and R is the correct explanation of A
Q5. Assertion (A): Plants with fibrous roots usually show parallel venation.
Reason (R): These plants are mostly monocots.
Answer: (a) Both A and R are true and R is the correct explanation of A
Passage-Based Competency Questions
Passage 1:
The pictures show four different plants with different types of roots.
Q1. Which plants have the same type of roots?
(a) Only plant 1 and plant 2
(b) Only plant 2 and plant 3
(c) Plant 1, plant 2 and plant 3
(d) Plant 2, plant 3 and plant 4
Answer: (c) Plant 1, plant 2 and plant 3
Explanation: All three have tap roots. Plant 4 has fibrous roots.
Q2. Why is the root of plant 1 thick and round?
Answer: Because it stores nutrients and water. It is a swollen taproot, helping the plant survive adverse conditions.
Passage 2:
The table lists four different plant groups and their features.
| Plant Group | Height | Stem Type |
|---|---|---|
| Group 1 | Short | Green and very weak |
| Group 2 | Short | Green and soft |
| Group 3 | Medium | Brown and hard |
| Group 4 | Tall | Brown and very hard |
Q3. Which group does a garden plant belong to?
(a) Group 1
(b) Group 2
(c) Group 3
(d) Group 4
Answer: (b) Group 2
Q4. Which group of plants most likely needs support to grow?
(a) Group 1
(b) Group 2
(c) Group 3
(d) Group 4
Answer: (a) Group 1
Explanation: The stem is very weak and cannot support the plant on its own.
Match the Column / Table-Based Question
Match the plant adaptations with their correct functions:
| Column A – Adaptation | Column B – Function |
|---|---|
| (i) Spines instead of leaves | (A) Floating and gas exchange |
| (ii) Thick fleshy stem | (B) Reduces water loss in desert conditions |
| (iii) Air spaces in aquatic plants | (C) Stores water for survival |
| (iv) Conical shape of mountain trees | (D) Helps shed snow easily |
Options:
(a) (i)-B, (ii)-C, (iii)-A, (iv)-D
(b) (i)-A, (ii)-B, (iii)-D, (iv)-C
(c) (i)-C, (ii)-D, (iii)-B, (iv)-A
(d) (i)-B, (ii)-A, (iii)-C, (iv)-D
Difficulty Level: Moderate
Correct Answer: (a) (i)-B, (ii)-C, (iii)-A, (iv)-D
Explanation:
- Conical trees shed snow easily on slopes
- Spines reduce surface area to minimize water loss in deserts
- Thick stems like cactus store water
- Air spaces help aquatic plants float and breathe
Think and Answer / Activity Corner
Q1. Take a walk around your school or home garden. Note down the different types of stems (soft, hard, woody, green) and classify the plants into herbs, shrubs, or trees.
Q2. Observe two plants at home – one with taproot and one with fibrous root. Note how they absorb water and remain upright. Which type seems stronger?
Q3. Why do you think plants in water bodies like lotus or water hyacinth float easily?
Q4. Collect three leaves – one from grass, one from mango, and one from banana. Compare the venation pattern and classify them as monocot or dicot.
Also check
- Extra Questions for Class 6 Science Chapter 5: Measurement of Length and Motion
- Extra Questions for Class 6 Science Chapter 4: Exploring Magnets
- Extra Questions for Class 6 Science Chapter 3: Mindful Eating
- Extra Questions for Class 6 Science Chapter 2: Diversity in the Living World
- Extra Questions for Class 6 Science Chapter 1: The Wonderful World of Science
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Chapter Summary
Chapter 2 introduces the concept of biodiversity — the variety of life forms on Earth, including plants, animals, and their habitats. Students explore the grouping of plants and animals based on common features, understand differences in leaf venation, root types, and plant structures like herbs, shrubs, and trees. The chapter emphasizes the importance of adaptations, classification, and conservation of biodiversity.
Learning Outcomes
- Understand the meaning of biodiversity and adaptation.
- Identify key features of plants like stem, leaves, roots, and flowers.
- Group plants and animals based on common observable features.
- Differentiate between types of roots, leaves, and habitats.
- Understand the importance of conservation and biodiversity protection.
Key Terms & Definitions
Biodiversity: The variety of living organisms in a particular area.
Adaptation: Special features that help an organism survive in its environment.
Habitat: The natural home of a plant or animal.
Grouping: Organizing organisms based on common features.
Taproot: A primary root with smaller branching roots.
Fibrous Root: Many thin roots growing from the base of the stem.
Reticulate Venation: Veins form a network, found in dicots.
Parallel Venation: Veins run parallel, found in monocots.
Herbs: Small plants with soft green stems.
Shrubs: Medium-sized woody plants.
Trees: Tall plants with hard, thick stems.
Frequently Asked Questions (FAQs) on Extra Questions for Class 6 Science
Q1: What are extra questions in Class 6 Science?
A1: Extra questions in Class 6 Science are additional questions beyond the NCERT textbook exercises. They help students understand the concepts better, prepare thoroughly for exams, and practice a variety of question types like MCQs, short and long answer questions.
Q2: Are Class 6 Science extra questions important for exam preparation?
A2: Yes, extra questions are very important for revision and practice. They often cover important concepts, NCERT-based topics, and new question types as per CBSE guidelines, which helps students perform better in exams.
Q3: Where can I find extra questions for Class 6 Science Chapter 2?
A3: You can find chapterwise Class 6 Science extra questions with answers right here on this page. These questions are based on the latest NCERT book and include MCQs, assertion-reason, passage-based, and long answer type questions.
Q4: Are the extra questions based on the latest CBSE syllabus and NEP 2020?
A4: Yes, all the Class 6 Science extra questions provided here follow the latest CBSE syllabus and include competency-based and NEP 2020-aligned question types to enhance critical thinking.
Q5: How can teachers use these Class 6 Science extra questions?
A5: Teachers can use these extra questions to create worksheets, conduct classroom quizzes, assign homework, or help students with targeted practice. The question-answer format makes it easy to use directly.
