Environmental Studies - Chapter 2 Diversity of Life Class ix

  Environmental Studies - Chapter 2 -Diversity of Life Class ix 

 These are exam-oriented MCQs covering every point mentioned in the ICSE 2028 syllabus.

SECTION 1: BIODIVERSITY (MCQs)

1.Biodiversity refers to: 

A. Variety of non-living things 

B. Variety of living organisms and ecosystems 

C. Variety of climates 

D. Variety of rocks

Answer: B

2. The term biodiversity was popularized by: 

A. Charles Darwin 

B. E.O. Wilson 

C. Mendel 

D. Linnaeus

Answer: B

3. Biodiversity includes: 

A. Plants only 

B. Animals only 

C. Microorganisms only 

D. All living organisms

Answer: D

4. Which of the following is NOT a component of biodiversity? 

A. Genetic diversity 

B. Species diversity 

C. Ecosystem diversity 

D. Atmospheric diversity

Answer: D

5. Biodiversity is important because it: 

A. Maintains ecological balance 

B. Provides resources 

C. Supports life 

D. All of these

Answer: D

6. Genetic diversity refers to: 

A. Variety of ecosystems 

B. Variety of genes within a species 

C. Variety of species 

D. Variety of habitats

Answer: B

7. Different varieties of mango are examples of: 

A. Species diversity 

B. Ecosystem diversity 

C. Genetic diversity 

D. Community diversity

Answer: C

8. Genetic diversity helps organisms: 

A. Adapt to environmental changes 

B. Become extinct 

C. Reduce variation 

D. Stop evolution

Answer: A

9. Which of the following shows genetic diversity? 

A. Tiger and lion 

B. Rose and sunflower 

C. Different breeds of dogs 

D. Forest and desert

Answer: C

10. Low genetic diversity may lead to: 

A. Better adaptation 

B. Greater resistance 

C. Increased vulnerability 

D. More biodiversity

Answer: C

11. Species diversity refers to: 

A. Number and variety of species 

B. Number of genes 

C. Number of habitats 

D. Number of ecosystems

Answer: A

12. A region containing many different species has: 

A. Low species diversity 

B. High species diversity 

C. No biodiversity 

D. Genetic diversity only

Answer: B

13. Which ecosystem usually has the highest species diversity? 

A. Desert 

B. Tundra 

C. Tropical rainforest 

D. Polar region

Answer: C

14. Species richness means: 

A. Number of individuals 

B. Number of species 

C. Number of genes 

D. Number of habitats

Answer: B

15. Greater species diversity generally results in: 

A. Less stability 

B. More ecosystem stability

C. More pollution 

D. Less productivity

Answer: B

16. Ecosystem diversity refers to: 

A. Variety of ecosystems 

B. Variety of genes 

C. Variety of species 

D. Variety of populations

Answer: A

17. Which pair represents ecosystem diversity? 

A. Tiger and lion 

B. Desert and forest 

C. Cow and buffalo 

D. Rice and wheat

Answer: B

18. India possesses high ecosystem diversity because of: 

A. Different climates and landforms 

B. Single climate 

C. Uniform vegetation 

D. Lack of rainfall

Answer: A

19. A wetland and a grassland differ mainly in:

A. Ecosystem type 

B. Genes 

C. Species only 

D. Population size

Answer: A

20. The largest ecosystem on Earth is: 

A. Pond 

B. Forest 

C. Biosphere 

D. River

Answer: C

21. Biodiversity contributes to: 

A. Soil formation 

B. Pollination 

C. Nutrient cycling 

D. All of these

Answer: D

22. Biodiversity helps in: 

A. Maintaining food chains 

B. Ecological balance 

C. Sustainable development 

D. All of these

Answer: D

23. Loss of biodiversity can cause: 

A. Ecosystem instability 

B. Increased ecological balance 

C. Better adaptation 

D. More resources

Answer: A

24. Medicines obtained from plants show biodiversity's: 

A. Economic value 

B. Cultural value 

C. Scientific value 

D. All of these

Answer: D

25. Biodiversity acts as: 

A. Life-support system 

B. Pollutant 

C. Waste material 

D. Parasite

Answer: A

26. The greatest threat to biodiversity is: 

A. Habitat destruction 

B. Rainfall 

C. Wind 

D. Photosynthesis

Answer: A

27. Deforestation leads to: 

A. Increase in biodiversity 

B. Habitat loss 

C. Soil improvement 

D. More species

Answer: B

28. Poaching refers to: 

A. Conservation 

B. Illegal hunting 

C. Farming 

D. Afforestation

Answer: B

29. Invasive species can: 

A. Increase native biodiversity 

B. Compete with native species 

C. Improve habitats 

D. Reduce competition

Answer: B

30. Climate change affects biodiversity by: 

A. Altering habitats

B. Changing migration patterns 

C. Increasing extinction risk 

D. All of these

Answer: D

31. The country with one of the richest biodiversities is: 

A. India 

B. Greenland

C. Iceland 

D. Antarctica

Answer: A

32. India is known as: 

A. Mega-diverse country

 B. Desert nation 

C. Polar nation 

D. Island nation

Answer: A

33. The Western Ghats are famous for: 

A. High biodiversity 

B. Lack of vegetation 

C. Snowfall 

D. Desert climate

Answer: A

34. Many endemic species are found in: 

A. Biodiversity hotspots 

B. Industrial zones 

C. Urban centres 

D. Polar regions

Answer: A

35. An endemic species is: 

A. Found everywhere 

B. Found only in a particular region 

C. Extinct species 

D. Invasive species

Answer: B

36. If all varieties of wheat become genetically identical, the crop would: 

A. Become more resistant 

B. Become vulnerable to diseases 

C. Increase biodiversity 

D. Improve adaptation

Answer: B

37. A forest with many species of plants, insects, birds and mammals shows: 

A. High species diversity 

B. Low biodiversity 

C. Genetic diversity only 

D. Ecosystem diversity only

Answer: A

38. Which biodiversity level is represented by different ecosystems in India? 

A. Species diversity 

B. Ecosystem diversity 

C. Genetic diversity 

D. Population diversity

Answer: B

39. The extinction of one species may affect: 

A. Food chains 

B. Food webs 

C. Ecosystem balance 

D. All of these

Answer: D

40. Biodiversity conservation is important because: 

A. Every species has ecological value 

B. It supports human survival 

C. It maintains ecosystem functions 

D. All of these

Answer: D