<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>
They are unable to breed because Drosophila simulans is larger than D rosophila melangaster
12. D
13. B
14 . C
I hope I helped you. I don't know if I was helpful.
Unlike mitosis, meiosis of a single cell results in the formation of <span>four genetically unlike cells. The correct option among all the options that are given in the question is the fourth option or the last option or option "d". I hope that this is the answer that has actually come to your desired help.</span>
Answer:
The double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a spiral staircase. Each chain has a backbone in which a sugar (deoxyribose) and a phosphate group alternate.