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How does a substance cross the cell membrane in diffusion? a- flowing down the concentration gradient b- binding to a carrier protein c- going through a pump d- going through a channel protein (ck-12)
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How does a substance cross the cell membrane in diffusion?

a- flowing down the concentration gradient
b- binding to a carrier protein
c- going through a pump
d- going through a channel protein
(ck-12)

User PilotBob
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1 Answer

2 votes

Answer:

A

Step-by-step explanation:

User Fogh
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