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The difference between active and passive transport is that–
A. Passive transport requires energy to move molecules up a concentration gradient, and active transport does not.
B. Passive transport can only move specific particles across a membrane, and active transport can move any particle.
C. Active transport requires energy to move molecules up a concentration gradient, and passive transport does not.
D. Active transport moves molecules in animal cells, and passive transport moves molecules in plants.
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The difference between active and passive transport is that–
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