The electron has permitted scientists to see objects at 200,000
times their normal size.

Which units ate used to measure both velocity and speed? check all that apply

How does secondary succession differ from primary succession?

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.