If, someday, an archaean cell is discovered whose SSU-rRNA sequence is more similar to that of humans than the sequence of mouse SSU-rRNA is to that of humans, the best explanation for this apparent discrepancy would be
A)homology.
B)homoplasy.
C)common ancestry.
D)retro-evolution by humans.
E)co-evolution of humans and that archaean.

Question

Quizplus · Accepted Answer

Homoplasy refers to a situation where a trait or sequence similarity arises independently in different lineages, not due to common ancestry, which could explain the similarity between the archaean and human SSU-rRNA sequences.

If, Someday, an Archaean Cell Is Discovered Whose SSU-RRNA Sequence