What is the main assumption behind the idea of a molecular clock?Multiple choice question.A constant rate of evolution of a moleculeA constant radioactivity rate in fossilsThe presence of a stable molecule that does not change over timeA constant rate of breakdown of an unstable molecule over time

Why is the use of a molecular clock controversial?Multiple choice question.It is only useful in some species.It assumes that rates of evolution are different for different genes.It assumes that DNA divergence rates are constant over time.It does not incorporate information from the fossil record about the timing of evolutionary events.

Select all that applySelect all of the following that are true about molecular clocks.Multiple select question.They use the mutation rate of genes to determine the time of divergence from a common ancestor.They can be used to predict when new species are going to form in the future.They can be used to estimate when humans and chimps diverged from a common ancestor.They can be used in absolute dating of fossils.

Why is mtDNA referred to as a molecular clock?2018 Atomi QuestionA(Choice A)It replicates in synchrony with the cell cycleB(Choice B)We use it to estimate the age of individualsC(Choice C)Alterations in mtDNA occur irregularlyD(Choice D)We use it to estimate the date that different species diverged

A(n) clock uses differences in DNA to determine when organisms diverged from a common ancestor.

The Molecular Clock through evolution is determined by the rate of mutation and the degree of purifying selection. The Clock runs slower in what parts of the genome? Exons Polyadenylation sequences Introns 5' untranslated regions Long-repetitive sequences