Which statement is true please help

Proteins are made of amino acids.

Explanation:

Proteins are built of "chains" of amino acids.

Option A

Explanation:

Amino acids are building blocks of polypeptides. The link together in a chain to form a protein which is a polypeptide.

the correct answer is phenotype

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.