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5 votes
____ is among the few simple molecules that can cross the cell membrane by diffusion

A)Water
B)Carbon Dioxide
C)Oxygen
D)All of the above

User Ashokbabuy
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2 Answers

0 votes
B is the the correct answer
User HanJeaHwan
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2 votes
I'd say carbon cause it has 4 valence electrons
User Steenbergh
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