Based on the results from phylogenetic studies of HIV (and assuming a molecular clock), it has been determined that HIV entered the human population _______ years before it became a global pandemic.
A) less than 5
B) about 10
C) about 20
D) about 35
E) at least 50

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The Answer of Based on the results from phylogenetic studies of HIV (and assuming a molecular clock), it has been determined that HIV entered the human population _______ years before it became a global pandemic.
A) less than 5
B) about 10
C) about 20
D) about 35
E) at least 50

Based on the Results from Phylogenetic Studies of HIV (And