Assertion: In a food chain members of successive higher levels are fewer in number.
Reason: Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.
The correct answer is:Assertion: In a food chain members of successive higher levels are fewer in number.
Reason: Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.
The correct answer is:
Assertion: Tropical rain forests are disappearing fast from developing countries such as India. Reason: No value is attached to these forests because these are poor in biodiversity. The correct answer is: |
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Which of the following is an example of man-made ecosystem? |
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Animals living at the bottom of the sea are known as |
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The food chain, in which the microorganisms breakdown the energy-rich organic compounds prepared by the producers, is known as |
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Biotic factors refer to |
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Microbes that break down the complex organic matter into simple substances like carbon, nitrogen, water etc. are |
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The 10% law for energy transfer in food chains was given by |
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Which one of the following statements is correct for secondary succession? |
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In an ecosystem, the main source of energy is |
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Of the total incident solar radiation the proportion of PAR is |
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