Which statement best distinguishes plants and animals as they relate to amino acids? plants can synthesize all twenty amino acids. humans must eat plants or animals to obtain some of these amino acids. plants can synthesize all twenty amino acids. humans must eat plants to obtain all of these amino acids. plants can only synthesize ten amino acids. humans synthesize the other ten amino acids. plants and humans both synthesize all twenty amino acids. humans must supplement a few of these by eating plants.

Plants can synthesize all twenty amino acids. Humans must eat plants or animals to obtain some of these amino acids.

Explanation:

Proteins are polymers of 20 standard amino acids. Plants can make all 20 amino acids by themselves. Human is heterotrophs and derives their nutrition from plants and animal resources.

Human can make nonessential amino acids from simple precursors but can not synthesize 9 essential amino acids which they should derive from their food resources, that is, plants, animals and microbes.