Water, Sunlight energy, and CO2(carbon dioxide)
Im going to go with C only because most dont make sense.
Functions of cell surface Receptors .
most ligands responsible for cell-cell signaling ( including neurotransmitters, peptide, hormones, and growth factors) bind to receptors on the surface of their target cells.
Answer:
competition, predation, commensalism, mutualism and parasitism.
Explanation: