The primary male hormone is
a. produced throughout a male's entire lifetime.
b. testosterone.
c. estrogen.
d. only involved in sperm production.
e. produced in the brain.
B
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Which of the following statements regarding blood vessel structure is NOT true?
a) walls of arteries and veins contain 3 layers or tunics b) veins typically have thinner walls c) capillaries contain valves d) the tunica media is the thickest layer in arterial walls
Which of the following insect hormones acts on the body tissues to stimulate molting and metamorphosis?
A. ecdysone B. PTTH C. juvenile hormone D. brain peptide E. All of the answer options are correct.
APITM, EnterotubeTM, and VitekTM are all
A. methods for extracting DNA from bacteria. B. used to measure gas production. C. commercially available methods used to identify bacteria. D. used to show the presence of bacteria in a sample.
The Southern Hemisphere has no equivalent of the arctic tundra because:a
it has no latitudes near the poles. b. it has insufficient altitudes. c. it has no land in the proper latitudes. d. it is too close to the sun during the winter. e. it has an inhospitable temperature.