Answer: Serotonin
Explanation:
Serotonin is an hormone, derived from the amino acid, tryptothan. It is involved in vasodilation, sleep regulation, mood changes, capillary permeability, and causes contraction of smooth muscles like that of the stomach to signal hunger.
Answer:
B. genotype
Explanation:
Genotype determines an organism's phenotype.
Answer:
no one is that I can get it to you tomorrow at the same time ago i used to
Explanation:
no one is that I can get it to you tomorrow at the same time ago i used to
<span>Choices (b) and (c) are the most correct. Bilateral symmetry requires a central axis for there to be two halves. In addition, this type of symmetry requires a head, which will encounter the environment before any other part of the body and move in the direction of travel. Most animals exhibit this characteristic.</span>
