Question

in the absence of microorganism the earth would become a heap of Dead plants and animals justify this statement

Answer 1

microorganisms are a very good decomposers it helps decompose dead plants and animal hence in it's absence will there would be heaps of dead plants and animals..

Answer 2

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when when a plant or animal dies it leaves behind nutrients and energy in the organic materials that form its body structure. microorganisms (decomposers) eventually converters all such organic matter into carbon dioxide and nutrients . This nutrients becomes a part of the soil. In this way the microorganisms clear the environment.

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