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Alina [70]
2 years ago
12

PLEASE HELP ASAP I WILL MARK BRAINLIEST!! PLEASE NO MEAN OR OFF_TOPIC ANSWERS!! :(

Chemistry
2 answers:
Elis [28]2 years ago
6 0

Answer:

In living systems, diffusion of substances into and out of cells is mediated by the plasma membrane. Some materials diffuse readily through the membrane, but others are hindered, and their passage is only made possible by protein channels and carriers.

Explanation:

mote1985 [20]2 years ago
3 0

Answer:

The membrane

Explanation:

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The answer is 15g
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