The spur-and-groove formation of coral reefs is used as a means of:
a. obtaining more sunlight.
b. dissipating the energy of the waves.
c. ensuring good circulation.
d. capturing more zooplankton.
e. directing fish migrations.
B
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At this time, EIA tests are too difficult for routine diagnoses
Indicate whether the statement is true or false.
How do the constituents of liquid medium differ from solid, gel-like medium?
a. Liquid medium contains agar, a polysaccharide extracted from algae. b. Solid medium contains agar, a polysaccharide extracted from algae. c. Solid medium contains agar, a complex lipid extracted from bacterial membranes. d. Liquid medium contains more salts, which lower the freezing point. e. Solid medium contains more fatty acids, which raise the melting point.
In a species of mice, short hair is dominant to long hair. If a short-haired individual is crossed with a long-haired individual and both long- and short-haired offspring result, one can conclude that:
A: the short-haired individual is homozygous. B: the short-haired individual is heterozygous. C: the long-haired individual is homozygous. D: the long-haired individual is heterozygous. E: This cannot be answered without more information.
What is the mechanism of action for the antihelminthic drug praziquantel?
A) interferes with glucose uptake by targeting microtubules B) paralyzes the parasites C) blocks anaerobic energy metabolism in protozoa D) targets nucleic acids E) the mechanisms of action are unclear