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.
ANIMAL. It's because animals are living organisms. Also 6 letters! A-N-I-M-A-L!
Hypotheses must be provable. If scientists cannot prove a "hypothesis" right or wrong, they need to change it to a legitimate hypothesis - something you can prove.
If it is proven wrong, they can change certain aspects of it to make a more specific experiment.
A population will most likely deplete the resources of its environment if the population "increases".
<span>The mother of a 10-year-old boy with mild scoliosis asks the nurse, "how long will my son have to continue his exercises before he's better?" how should the nurse respond?</span>
