What substance reacts with an acid or a base to control ph

The shift of a vehicle's weight around its center of gravity is known as

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.

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.