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4 votes
Diffusion is the movement of a substance

a.only in liquids.
b. through only a lipid bilayer.
c. down its concentration gradient.
d. against its concentration gradient.

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User Xshoppyx
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1 Answer

2 votes

Answer:

A

Step-by-step explanation: not sure how i can explain it but im pretty sure that is correct, theres not really an explanation as much as thats just how it is if you understand.

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User RubbleFord
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