How do G1 and G2 of the cell cycle for blastomeres in cleavage differ from G1 and G2 of the cell cycle in growing adult cells, such as skin, liver, blood, and bone cells?

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

answer; the male's sperm cells have mitochondria, but because the sperm contributes dna but no cytoplasm, no mitochondria are passed to the egg at ferilization;

answer///systemic;