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Class 12 Biology Practice Test: Ecosystem - Productivity
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Class 12 Biology Practice Test: Ecosystem - Productivity
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21 Questions

1. What is the rate of biomass production called?
2. Which of the following is a unit of net productivity?
3. By what letter is the net primary productivity designated?
4. How much is the productivity of oceans?
5. What is the balance between photosynthesis and respiration and other plant losses as death referred to?
6. By what letter is the gross primary productivity designated?
7. What is the rate of storage of organic matter not used by consumers called?
8. What is the available biomass for the consumption of heterotrophs?
9. What is NPP equal to?
10. How much is the productivity of landmass?
11. Which of the following is a unit of productivity?
12. On whom does the primary productivity depend on?
13. Which of the following is a unit of primary productivity?
14. What is the rate at which solar energy is converted and stored by the producers per unit area over a time period called?
15. What is the approximate amount of the annual net primary productivity of the whole biosphere?
16. What is the rate of production of new organic matter by heterotrophic organisms (consumers) called?
17. Which of the following is estimated in either the photosynthetic number or chlorophyll content?
18. How much of Earth’s surface is occupied by oceans?
19. What are the two types of primary productivity?
20. What is a frog that feeds on insects example of?
21. Which of the following contributes to the highest rate of primary productivity?

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