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

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