Nucleic acid sequences that undergo few changes over the course ...

[geoffrey]

Nucleic acid sequences that undergo few changes over the course of evolutionary time are said to be conserved. Conserved sequences of nucleic acids
A) are found in the most crucial portions of proteins.
B) include all mitochondrial DNA.
C) are abundant in ribosomes.
D) are proportionately more common in eukaryotic introns than in eukaryotic exons.
E) comprise a larger proportion of pre-mRNA (immature mRNA)
than of mature mRNA.

[penguins]

Easy! It's C. Bye for now