Which neurotransmitter is not an amino acid derivative?
A) GABA
B) serotonin
C) histamine
D) dopamine
E) glutamate
Answer: D
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Clines are created when
A) emigrants remove alleles and immigrants introduce alleles. B) immigrants remove alleles and emigrants introduce alleles. C) different genes mutate in different geographical regions. D) men marry their nieces as part of their culture.
Which of the following is true regarding the benefits of wind energy?
A. considered to be nonpolluting B. tend to be extremely cost-efficient and inexpensive to manufacture C. considered to be a nonrenewable resource D. All of the answer choices are correct.
Which molecule is the most abundant in the extracellular matrix of connective tissues?
a. collagen b. cholesterol c. fibronectin d. albumin e. elastin
The process of converting nitrogen gas to ammonium is called
A) biogeochemical processing. B) sublimation. C) nitrogen fixation. D) evaporation. E) nitrification.