________ makes it possible to trace phylogenies among microbial groups for which there is no fossil record
A) Convergent evolution
B) Using vertebrate outgroups
C) Horizontal gene transfer
D) Molecular systematics
Answer: D
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The level of organization where factors such as
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A) 1, 2, and 3 only B) 2 and 3 only C) 1 and 4 only D) 1, 2, 3, 4