Each of the following activates a receptor tyrosine kinase except
A) EGF.
B) PDGF.
C) TGF?
D) FGF.
E) Insulin.
Answer: C
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If an atom has a charge of +1, which of the following must be true?
A) It has two more protons than neutrons. B) It has the same number of protons as electrons. C) It has one more electron than it does protons. D) It has one more proton than it does electrons.
The population size that a particular habitat can support indefinitely is called the
a) carrying capacity b) intrinsic population size c) cohort d) realized niche e) survivorship curve
In general, in a population in which a trait is exposed to stabilizing selection over time:
a) the mean increases and variation decreases. b) the mean increases and variation increases. c) the mean stays approximately the same and the variation decreases. d) the mean changes and the variation decreases. e) the mean stays approximately the same and the variation increases.
Emerging infectious diseases are due to:
A. Deforestation B. Humans moving to previously inhabited areas C. Mutations in existing microbes D. All of the above