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8 June, 02:49

Single-celled organism can get the oxygen they need across their cell membrane

because ...

A. they have a small surface area to volume

ratio to allow sufficient transport of molecules into and out of the cell

B. they have a large surface area to volume

ratio to allow sufficient transport of molecules into and out of the cell

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Answers (1)
  1. 8 June, 03:14
    0
    Answer: B
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