In Sub-Saharan Africa, the adoption of agriculture led to an increase in mosquitos, which in turn lead to a spread of the human gene for Sickle-Cell trait, because the heterozygous genotype produces a heightened resistance to malaria. This is an example of:
a. anthropological racism.
b. biocultural evolution.
c. eugenics.
d. biological determinism.
Answer: b. biocultural evolution
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Prostaglandins ________ the sensitivity of pain neurons, which become ________ with continued stimulation.
A. increase; less sensitive B. increase; more sensitive C. decrease; more sensitive D. decrease; less sensitive
What type of stress could form the fault in this figure?
A) Confining pressure
B) Horizontal tension
C) Horizontal compression
D) Horizontal pushing
E) Any of these is correct.
In the ____________________ and ____________________ method of protecting slopes, material is
removed from the top of the slope and used as fill at the base. Fill in the blank(s) with the appropriate word(s).
The boundary between two adjacent air masses is called
A) entrainment. B) a front. C) adiabatic. D) an air strip.