What kind of molecular information is commonly used to study phylogeny among species that diverged from a common ancestor relatively long ago?
A)Whole genomes because they are easy to obtain.
B)Segments of cellular membrane proteins because the proteins,coded by DNA,are found in all living organisms.
C)The mitochondrial genome because it easily incurs neutral mutations.
D)Small ribosomal subunit (SSU)RNA because it is found in the genomes of all living organisms.
E)DNA sequences within introns because their sequences change rapidly over evolutionary timE.

Question

Quizplus · Accepted Answer

The small ribosomal subunit (SSU) RNA is found in all living organisms and evolves relatively slowly, making it a useful molecular marker for studying phylogeny among species that diverged from a common ancestor relatively long ago. It is also conserved across taxa, meaning that it is unlikely to have undergone significant changes in function.

What Kind of Molecular Information Is Commonly Used to Study