Which of the following is not a chemical class of neurotransmitters?
A) nucleic acid
B) biogenic amine
C) acetycholine
D) ATP and other purines
E) amino acid

Which enzymes break down carbohydrates?

What contributes to the high level of biodiversity found in wetlands? a. the large amount of available organic matter to organisms that are food for larger organisms b. the amount of available water for organism use c. the high nutrient availability d. all of the above select the best answer from the choices provided a b c d

Glands that the body deal with stress and respond to emergencies.