Diffusion is insufficient to meet .......... requirement of multicellular organisms like humans.

Oxygen

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Carbon dioxide

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Nitrogen

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Water

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Solution

The correct option is A Oxygen
Multicellular organisms need oxygen to live. The multiple layer of cells in multicellular organism means that the surface area to volume ratio is low; so, diffusion happens slowly. If only diffusion would have been the source then only the outer layer of the body would get oxygen and the inner layers would be oxygen deprived. So, the organism will die.

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why is diffusion insufficient to meet the oxygen requirement of multicellular organisms like humans.

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Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?

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