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What does the base tier of the ecologica...

What does the base tier of the ecological pyramid represent ?

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PRADEEP-ECOSYSTEM-Very short answer
  1. Oxygen content of the air is not affected by human activities. Why?

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  2. How long a primary succession takes to complete ?

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  3. Define succession.

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

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

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

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

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

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

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

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  11. Justify the pitcher plant as a producer.

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

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

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

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

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

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

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

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  19. How is 'stratification' represented in a forest ecosystem?

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  20. Define the term standing crop.

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