After a zygote is formed, specialization of cells occurs. through which process do the cells of a zygote become specialized?
(1)sexual reproduction
(2)meiosis
(3)fertilization
(4)differentiation

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.