Phylogenetic comparisons of secondary structures of rRNAs from a variety of species reveals ____ structures and ____ nucleotide sequences of the rRNAs themselves.
A) strikingly similar; high degree of similarity
B) strikingly similar; low degree of similarity
C) dissimilar; high degree of similarity
D) dissimilar; low degree of similarity
E) none of the above

Question

Quizplus · Accepted Answer

Phylogenetic comparisons often show that the secondary structures of rRNAs across different species are strikingly similar, indicating a strong conservation of these structures throughout evolution. However, the nucleotide sequences of the rRNAs themselves can show a low degree of similarity, reflecting the variations that can occur at the sequence level while still maintaining the overall structure necessary for the rRNA's function.

Phylogenetic Comparisons of Secondary Structures of RRNAs from a Variety