Scientists once assumed that the earliest protocells would have been autotrophs. This concept appears to be
A incorrect, since glycolysis and fermentation require complex enzymes for catalytic reactions.
B correct, since glycolysis and fermentation only occur after oxygen is present from photosynthesis.
C correct, since heterotrophs would depend upon eating autotrophs.
D incorrect, since the primordial soup likely contained many preformed food molecules suitable for heterotrophic
metabolism.
