How does apoptosis aid in normal embryo development? Choose 1 Choose 1 (Choice A) A It causes neurological impairment of the embryo. (Choice B) B It helps sculpt body parts by removing unnecessary cells. (Choice C) C It reduces the amount of DNA in an embryo. (Choice D) D It gives extra nutrients to newly formed cells.

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.