Question

1 what is the difference between active and passive transport? a active transport requires energy; passive transport does not. b active transport moves molecules across cell membranes; passive transport does not. c active transport involves oxygen and water molecules; passive transport does not. d active transport occurs only in nerve cells; passive transport occurs in all the bodys cells.

Explanation:

Active transport moves molecules against their concentration gradient and requires energy (usually ATP). Passive transport moves molecules down their concentration gradient and does not require energy input.

Answer:

A. Active transport requires energy; passive transport does not.