Question

In single called orgionams diffusion is sufficient to meet on thier requirment of gases or removal of waste s but it not in case of multicellular organisms erplain the reason

Answer 1

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Answer 2

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■ In multi - cellular organisms, all the cells may not be in direct contact with the surrounding environment.

■thus,simple diffusion will not meet the requirements of all the cells.

■In case of a single - celled organism, no specific organs for taking in food, exchange of gases or removal of wastes may be needed because the entire surface of the organism is in contact with the surrounding environment.

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