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Why is diffusion insufficient to meet th...

Why is diffusion insufficient to meet the oxygen requirement of multicellular organisms like humans?

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Because all the cell may not be in direct contact with the surrounding environment.
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Knowledge Check

  • One mole of an organic compound is found to require only 0.5 mole of oxygen to produce an acid. The compounds is an

    A
    Alcohol
    B
    Aldehyde
    C
    Ether
    D
    Ketone.

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