When an organism excretes waste, can a plant directly use it as fertilizer (nitrogen source)?

what's the

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely