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Why are nutrient cycles in nature called...

 Why are nutrient cycles in nature called biogeochemical cycles? 

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Because I.m nutrient cycles , the elements move cyclically from environment to living organisms and back to the environment .
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MODERN PUBLICATION-ECOSYSTEM -NCERT Exemplar Problems (B. VERY SHORT ANSWER TYPE QUESTIONS)
  1. Name an organism found as secondary carnivore in an aquatic ecosystem.

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

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  3. Under what conditions would a particular stage in the process of succe...

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

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

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  6. Justify the pitcher plant as a producer.

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

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  8. In the North East region of India, during the process of jhum cultivat...

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  9. Climax stage is achieved quickly in secondary succession as compared t...

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

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  11. What is the ultimate source of energy for the ecosystems?

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  12. Is the common edible mushroom an autotroph or a heterotroph?

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  13. Why are oceans least productive?

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  14. Why is the rate of assimilation of energy at the herbivore level calle...

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  15. Why are nutrient cycles in nature called biogeochemical cycles?

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  16. Give any two examples of xerarch succession.

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  17. Define self sustainability

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  18. What are planktons?

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

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