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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

User Mcloving
by
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1 Answer

7 votes

Answer: B

Step-by-step explanation:

User Zak
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