Biodiversity Quiz - CBSE Class 11 Biology

Free practice quiz: Biodiversity (CBSE Class 11 Biology). 38 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Biology practice quiz has 38 multiple-choice questions on Biodiversity. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is biodiversity?

   1. Variety of ecosystems
   2. Variety of species
   3. Variety of genetic information
   4. All of the above
   Show answer

   Answer: D. All of the above

2. What does the term 'extinction vortex' refer to?

   1. A phenomenon in which a species becomes increasingly rare
   2. A sudden and rapid extinction event
   3. A biological reserve for endangered species
   4. An increase in biodiversity
   Show answer

   Answer: A. A phenomenon in which a species becomes increasingly rare

3. What is the significance of keystone species in an ecosystem?

   1. They are the most abundant species in an ecosystem
   2. They have a disproportionately large impact on their environment
   3. They are always the largest species in an ecosystem
   4. They contribute to genetic diversity
   Show answer

   Answer: B. They have a disproportionately large impact on their environment

4. What is the main benefit of high biodiversity in an ecosystem?

   1. Increased resilience to environmental changes
   2. Higher competition among species
   3. Reduced habitat complexity
   4. Lower resource availability
   Show answer

   Answer: A. Increased resilience to environmental changes

5. How does deforestation contribute to the decline of biodiversity?

   1. By providing more habitats
   2. By converting forests into agriculture
   3. By planting monocultures
   4. By stabilizing the soil
   Show answer

   Answer: B. By converting forests into agriculture

More questions in this quiz

Answers and explanations are in the full quiz.

1. What role do keystone species play in an ecosystem?
2. What is an example of genetic diversity?
3. Which of the following is a method for conserving biodiversity?
4. Which of the following best describes the concept of ecosystem services?
5. What impact does climate change have on biodiversity?
6. What is the significance of the IUCN Red List?
7. Which is a common indicator of ecosystem health?
8. Regarding the concept of carrying capacity, what is meant by the term?
9. In the context of biodiversity, what is 'functional redundancy'?
10. What is the relationship between biodiversity and ecosystem stability?
11. Which of the following best describes the term 'endemic species'?
12. Which factor is NOT a threat to biodiversity?
13. How does deforestation impact biodiversity?
14. Which of the following is a consequence of loss of biodiversity?
15. What is the main objective of biodiversity conservation?
16. How does climate change affect biodiversity?
17. What does the term 'biodiversity hotspot' refer to?
18. How does genetic diversity contribute to the resilience of species?
19. Which of the following is a measure of species diversity?
20. Which of the following best describes the concept of endemic species?
21. What is a biodiversity hotspot?
22. How do invasive species affect biodiversity?
23. Which of the following is an example of genetic diversity?
24. What factor is NOT a threat to biodiversity?
25. Which of the following ecosystems is most likely to have the highest biodiversity?
26. What does the term 'biodiversity' encompass?
27. Which of the following is NOT a benefit of biodiversity?
28. Which of the following ecosystems is generally known for having extreme biodiversity?
29. How can overfishing affect biodiversity?
30. What is the role of keystone species in an ecosystem?
31. What is the primary cause of species endangerment?
32. Which practice is most likely to threaten biodiversity on a global scale?
33. What is the most critical action needed to preserve biodiversity?

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