Answer:
1) A phosphate group.
2) A 5-carbon sugar.
3) A nitrogenous base.
Explanation:
A sharp, ringing sound made by the collision of sonorous (especially metallic) bodies.
Either B) increased parasympathetic stimulation of the heart. OR D) Constriction of elastic arteries to maintain blood pressure. I'm leaning more towards D) constriction of elastic arteries to maintain blood pressure.