Give one reason why multicellular organisms require special organs for
exchange of gases between their body and their environment.
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A reason is that multicellular organisms need special organs for exchange of gases with the environment because of prokaryotic cells found in the body. The cells are not in contact with the environment and therefore diffusion would not work in the exchange of gases. The organs in the body therefore serve this purpose.
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Answer:
In unicellular organisms the entire body of the organism is in contact with the environmental hence exchange of materials can take place but in multicellular organisms the entire body of the organism is not in contact with the environment and hence simply diffusion is not helpful.
Explanation:
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