Protocells likely grew within microscopic compartments in porous alkaline vent chimneys, where ____
a. protocells could use the energy provided by H+ gradients
b. the vents offered physical protection
c. protocells could use readily available ammonia sources
d. the vents funneled geothermal warmth
e. the vents were the right size
ANSWER: a
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Nucleus Centriole Golgi apparatus Cell wall
If evolution has occurred:
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