21.
What is the meaning of term ecological succession ?
The gradual and predictable change in the species composition of a given area is called 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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24.
The amount of Biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called ..........................
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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.