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Why would multicellular organisms face problems without a transport system?

Answer and explanation

Correct answer: Food and oxygen could not reach all cells, nor could wastes be removed

The governing concept is transport in multicellular life. Cells deep inside a large organism are far from the external environment, so diffusion alone is too slow to deliver oxygen and nutrients or remove carbon dioxide and other wastes. Circulatory or vascular systems move materials over these distances. Therefore option A is correct; the other choices contradict basic cellular requirements and organism structure.

Related tags

Transport SystemMulticellular OrganismsMaterial ExchangeLife ProcessesWorld Of LivingScienceClass 10 Mcq

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