Question

question 38
the notion that organisms that are more distantly related should have time to accumulate more genomic differences than those more closely related can best be illustrated using
o a molecular clock
o radioactive isotope dating
o the geologic time scale
o gel electrophoresis

Explanation:

A molecular clock is a technique that uses the mutation rate of biomolecules (such as DNA, RNA, or proteins) to estimate the time when two or more life forms diverged from a common ancestor. The basic assumption is that the number of mutations (genomic differences) between two organisms is proportional to the time elapsed since their divergence. So, more distantly related organisms would have accumulated more mutations (genomic differences) over a longer period of time compared to more closely related ones. Gel electrophoresis is a laboratory technique used to separate DNA, RNA, or proteins based on their size and charge. The geologic time scale is a system of chronological dating that relates geological strata to time. Radioactive isotope dating is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes. None of these other options directly relate to the concept of genomic differences accumulating over time based on evolutionary relatedness.

Answer:

a molecular clock