Answer: Amino acids are organic compounds (molecules) that contain amine (–NH2) and carboxyl (–COOH) functional groups, along with a side chain (R group) specific to each amino acid.
Explanation: The variation seen in naturally occurring amino acids arises from differences in this side chain.
The answer is H. He is mechanically digesting his food.
The organelles that perform roles equivalent to circulatory are ribosomes,endoplasmic reticulum,and the golgi body
The answer is A) prepares organisms for future changes in the environment
