How do small polar and charged molecules typically cross the cell membrane?

a. by facilitated diffusion
b. by osmosis
c. by active transport
d. by filtration


Ans: a. by facilitated diffusion

Biology & Microbiology

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Which of the following statements about digestion is true?

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What activity involves dragging huge nets weighted down with chains and steel plates over the ocean floor to harvest a few species of bottom fish and shellfish?

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