Cell differentiation in developing embryos occurs due to which of the following? A. the genes that are active

B. the genes that are present

C. the number of copies of each gene present

D. the types of proteins produced by each gene

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

The third stage of cellular respiration is (2 points)

When mitochondrial dna from living relatives was compared with mitochondrial dna from the skeletons, scientisits determined that skeletons 3,4,5,6 and 7 were members of the romanov family. which of these skeletons can be identified by name based on the evidence you have? explain your answer.