Aresearcher discovers a small molecule in muscle tissue that is rich in nitrogen, soluble in water, and lacks phosphorus. the molecule also contains carbon, hydrogen, and oxygen, in uneven ratios. the molecule must be a(n)

The molecule which is rich in nitrogen,  soluble in water, lacks Phosphorous, and also contains hydrogen and oxygen in uneven ratios is amino acid.

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.

yes, because even though a theory has a  lot of evidence to support it, it is not always true