Answer:
It’s A,B,E!!
Explanation:
I just did it on USATestPrep!!
<span>In the right atrium, the auricle and anterior wall exhibit obvious muscular ridges called MUSCULI PECTINATI.
Musculi pectinati or pectinate muscles are identified as specialized intracardiac muscle. The muscular ridges are like combs. These ridges help the right atrium dilate without much walls stress during adverse loading conditions.</span>
Answer:
homologous structures.
Explanation:
If two organisms look very similar during their early stages of development, this is evidence that the organisms. evolved from a common ancestor.
I'm guessing true, that's what my teacher says