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4 December, 00:37

Active transport occurs when molecules are moved across a semi-permeable membrane and

a concentration gradient.

A) down

B) up

+4
Answers (2)
  1. 4 December, 01:00
    0
    I think the answer is B UP
  2. 4 December, 01:25
    0
    the answer would be B (up)
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