Comparing sequences between genes and between species allows evaluation of the rates of change. Which of the following have been observed: Select one or more: (A) introns have a higher mutation rate than exons. (B) non-synonymous mutations are found at a higher rate than synonymous mutations.

A and B is correct.

Explanation:

Mutations are spontaneous variations to nucleotide sequences, therefore in two animals or two chromosomes they can not be identical by nature. Therefore, the introns interact with non-coding sequences and therefore their sequences are not established as consensus in nature and are therefore highly prone to mutations.

Hence both the statement are correct.

Answer:i think its b.)