What are the three main ideas of the cell theory

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

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.

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone