photosynthesis and cellular respiration are often described as existing in a cycle. what statement best describes why this is true?

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 statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn

Consider the equation s + o2 ? so2. what is the product? question 3 options: s so 2 s + so 2 o 2