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Small molecules, such as oxygen and carbon dioxide, pass through membranes by a process called​

User JPaget
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Answer: The process if called Diffusion!

Explanation: If the molecule is so small like carbon dioxide, this process does the trick. When the concentration of O2 outside the cell is higher than inside, O2 molecules diffuse in, passing through the membrane like it isn't even there.

User Fbiagi
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Answer:

diffusion

Step-by-step explanation:

User Ali Radmanesh
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