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Question

The pyramid of numbers for a terrestrial ecosystem is upright because the energy for supporting the organisms

A
remains same.
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B
increases.
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C
decreases.
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D
decreases and then increases.
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Solution

The correct option is C decreases.
In terrestrial ecosystem, the producers are maximum in number as they produce food for all the organisms feeding on them. They supply energy for the rest of the pyramid. Successive links of herbivores and carnivores decrease rapidly in number until there are very few carnivores at the top, because the amount of energy decreases at each trophic level to support the organisms.

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