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.

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 quizzes

• Ecosystem

Browse all Ecology quizzes