In phagocytosis
A. a particle enters a cell by moving down its concentration gradient.
B. a carrier molecule moves a substance across a cell membrane using ATP.
C. a cell membrane engulfs droplets.
D. a cell membrane engulfs solid particles.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
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________ form a temporary plug to stop bleeding in a broken blood vessel.
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