Describe what a "molecular clock" is. How do scientists choose which kinds of genes to use? What type of mutations do they look for, and
how might a molecular clock be used to build a phylogenetic tree for
related species?

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.