An important indicator of evolutionary relatedness is the
A) size of the periplic space.
B) similarities of cell membrane proteins.
C) size of the bacterial chromosome.
D) nitrogen base sequence of rRNA.
E) size of the ribosomes.

Question

Quizplus · Accepted Answer

The nitrogen base sequence of rRNA (ribosomal RNA) is a widely used indicator of evolutionary relatedness. This is because rRNA is a universally conserved molecule, meaning it is found in all living organisms and changes very slowly over time. By comparing the differences in rRNA sequences between different organisms, researchers can determine how closely related they are in evolutionary terms.

An Important Indicator of Evolutionary Relatedness Is the