Which structure begins protein digestion under acidic conditions?
a. mouth
b. stomach
c. small intestines
d. large intestines
e. liver
ANSWER: b
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The last two remaining females in this population disperse to join a different population that is
50 km away, where they breed with new males. If these females produce only sterile offspring as the result of mating with males in the new population, what type of reproductive isolation does this represent?
a. post-mating barrier b. pre-mating barrier c. temporal barrier d. behavioral barrier
A condition in which the male penis cannot beome erect and remains flaccid is called _____.
A) Sterility B) Spermatogenesis C) Prostate condition D) Erectile dysfunction
What are the two functions of increasing blood flow to the skin during exercise?
A) energy reserve for underlying musculature; provide energy for sweat production B) facilitate dissipation of heat; provide energy for sweat production C) facilitate dissipation of heat; remove water for sweat production D) fat utilization for energy production; remove water for sweat production E) facilitate dissipation of heat; energy reserve for underlying musculature
Figure 55-2 is a good illustration of:
a. bioconcentration.
b. biological magnification.
c. persistence.
d. narrow-spectrum botanicals.
e. the pesticide treadmill.