The most commonly accepted tree of life suggests that, after the origin of life, which of the following events occurred?
a. Bacteria arose from the first self-replicating, metabolizing cells.
b. There was a split between the bacteria and a line that gave rise to the prokaryotes and eukarya.
c. The fusion of a bacterium and a virus gave rise to the eukarya.
d. The fusion of a bacterium and an archaeon split from the protist line.
e. None of the above
Ans: a. Bacteria arose from the first self-replicating, metabolizing cells.
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