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Why is diffusion alone not sufficient to meet the life-process needs of multicellular organisms?

Answer and explanation

Correct answer: Many cells are far from the external environment, and diffusion is too slow to transport materials over long distances.

In a multicellular organism, many cells are far from the body surface. Diffusion is effective over short distances but too slow to supply all these cells quickly, so specialised transport systems are needed.

Related tags

DiffusionMulticellular-OrganismsTransportLife ProcessesWorld Of LivingScienceClass 10 Mcq

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