Fill in the right answer

Right answer is Primary productivity.

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21. What is the meaning of term ecological succession ?

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22. In what type of area does primary succession occur ?

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23. The rate of assimilation of food energy by consumers is called ............................

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Primary productivity.

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25. What is an ecosystem ?

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26. Who coined the term ecosystem ?

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27.

The amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc. present in the soil at any given time is called?

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28. What is humus?

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29. Who occupy the first trophic level of any ecosystem ?

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30. List the key functional aspects of ecosystems.

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