________ 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

Question

Quizplus · Accepted Answer

Molecular systematics uses DNA and RNA sequencing to trace evolutionary relationships among organisms. This is especially useful for microbial groups for which there is no fossil record, since molecular data can be used to construct phylogenies. Convergent evolution is a phenomenon where unrelated organisms evolve similar traits to adapt to similar environments, so it is not applicable here. Using vertebrate outgroups is a method in cladistics, but is not necessary for molecular systematics. Horizontal gene transfer is a mechanism of genetic exchange among bacteria, but it does not necessarily help in tracing phylogenies among microbial groups.

________ Makes It Possible to Trace Phylogenies Among Microbial Groups