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Oxygen content of the air is not affecte...

Oxygen content of the air is not affected by human activities. Why?

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Oxygen is replenished by photosynthesis.
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PRADEEP-ECOSYSTEM-Very short answer
  1. Phosphorus cycle has no atmospheric phase. Is it true ?

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  2. In which form can the plants take up sulphur ?

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  3. Oxygen content of the air is not affected by human activities. Why?

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  4. How long a primary succession takes to complete ?

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  5. Define succession.

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  6. Name the first community that develops in barren area.

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  7. Which of the following is a free living bacteria that can fix nitrogen...

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  8. Which of the following is a cyanobacterium that can fix atmospheric ni...

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  9. Name an organism found as secondary carnivore in an aquatic ecosystem.

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  10. What does the base tier of the ecological pyramid represent ?

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  11. Arrange the following as observed in Vertical stratification of a fore...

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  12. Name an omnivore which occurs in both grazing food chain and the decom...

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  13. Justify the pitcher plant as a producer.

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  14. Name any two organisms which can occupy more than one trophic level in...

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  15. Among bryophytes, lichens and fern which one is a pioneer species in a...

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  16. What is common to earthworm, mushroom, soil mites and dung beetlein an...

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  17. Write a difference between net primary productivity and gross producti...

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  18. Write the equation that helps in deriving the net primary productivity...

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  19. Why are green algae not likely to be found in the deepest strata or th...

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  20. What is a detritus food chain made up of? How do they meet their energ...

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