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Class 12 Biology Practice Test: Ecosystem - Phosphorus Cycle
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Class 12 Biology Practice Test: Ecosystem - Phosphorus Cycle
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14 Questions

1. The phosphate by weathering of rocks firstly becomes available to which organisms?
2. Who is the natural reservoir of phosphorous?
3. Which one of the following is the simplified sequence of phosphorus cycling in a terrestrial ecosystem?
4. How do herbivores and other animals obtain phosphorous?
5. Who is the natural reservoir of phosphorous?
6. Which of the following is a major constituent of DNA and RNA?
7. Which of the biochemical cycle is without an atmospheric component?
8. What is the killing of aquatic life due to the depletion of oxygen because of the excessive growth of algae due to the over-abundance of phosphorous in the coastal areas called?
9. How is the gaseous exchange of phosphorus between organisms and the environment?
10. Which element is not released during respiration in the atmosphere?
11. Which biogenetic element is obtained from crystalline rocks?
12. The phosphate by weathering of rocks firstly becomes available to which organisms?
13. Which one of the following is the simplified sequence of phosphorus cycling in a terrestrial ecosystem?
14. Which of the following component is used to make shells, bones, and teeth by animals?

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