Question

single celled organisms meet their oxygen requirements by the process of

Answer 1

Explanation:

Every living cell requires oxygen for performing cellular respiration. In unicellular organisms (e.g amoeba), the single cell is in direct contact with environment. Oxygen passes into it through diffusion. ... Cell to cell diffusion is a very slow process.

Answer 2

Explanation:

In unicellular organisms (e.g amoeba), the single cell is in direct contact with environment. Oxygen passes into it through diffusion. In simple multicellular organisms (e.g, hydra), every cell may take also oxygen through diffusion from environment

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