Multiple Choice
In passive processes, substances move across the plasma membrane 1. with the use of ATP
2) up (or against) a concentration gradient
3) down (or along) a pressure gradient
4) equally in all directions
A) 3 only
B) 2 only
C) 1, 2, 3
D) 2, 3, 4
Correct Answer:

Verified
Correct Answer:
Verified
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