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Liono4ka [1.6K]
2 years ago
9

Why is active transport necessary

Biology
2 answers:
murzikaleks [220]2 years ago
8 0

Answer:

B. Molecules can only enter the cell through ports in the membrane.

Explanation:

PLEASE MARK ME AS BRAINLIEST

djverab [1.8K]2 years ago
5 0

Answer:

B. Molecules can only enter the cell through ports in the membrane.

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