Centromere

A: The finches of the Galapagos Islands showed speciation after being isolated on different islands. Adapted to the different food sources on the different islands after a long period of time by changing the shape of their beaks.

B: The result of the follicle rupturing after the egg is released and releases progesterone to help form the uterine lining

C: The material of which the chromosomes of organisms other than bacteria (i.e., eukaryotes) are composed. It consists of protein, RNA, and DNA.

D: The center of the two chromosomes that holds them together. The centromeres split during anaphase 2