Based on the phylogenetic studies and the use of the molecular clock, scientists have determined that humans most likely were first infected with HIV in
A)1930.
B)1950.
C)1965.
D)1975.
E) 1985.

Question

Quizplus · Accepted Answer

Phylogenetic studies and molecular clock analyses suggest that HIV crossed into humans from chimpanzees around 1930, based on the genetic divergence of the virus.

Based on the Phylogenetic Studies and the Use of the Molecular