Which of the two phylogenies could have been constructed from virus samples that were sampled on the same day?

a. Phylogeny A. Phylogeny A could represent a snapshot across several hosts while most of the sequences in B were extinct when the last sample was taken.
b. Phylogeny A. It is much more work-intensive to isolate multiple virus se-quences from a single host than to obtain a single sequence from multiple individuals.
c. Phylogeny B. Phylogeny B could represent a snapshot of the diversity with-in a single host, while the pattern in B can only be produced by sequential infections of new hosts.
d. Phylogenies A and B. Aside from logistics, there are no reasons why the samples for both phy-logenies couldn't have been obtained on the same day.


A

Biology & Microbiology

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