Which evolutionary force is initially responsible for the genetic change in the human gene pool for sickle cell anemia?

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Where can you find prokaryotic and eukaryotic cells?

Aplant may open end close its stomata to prevent excess water loss and maintain