While we can use molecular clocks based on molecular sequence data to estimate the times at which various lineages diverged, we ultimately need the _____ to calibrate the clocks.
A)fossil record
B)character states
C)sister groups
D)transitional forms
E)DNA sequences

Question

Quizplus · Accepted Answer

The fossil record provides a record of when different species existed in the past and can be used to calibrate molecular clocks by providing known time points for important evolutionary events. The other options do not provide the necessary information to calibrate the clocks.

While We Can Use Molecular Clocks Based on Molecular Sequence