Which of the following does not indicate microbe involvement in energy and nutrient flow?
A. Formation of greenhouse gases, CO2 and methane
B. Thermal hot springs warmed by heat from earth's interior
C. Decomposition of dead matter and wastes
D. Digestion of complex carbohydrates in animal diets
Answer: B
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Cyclosporin A
A. is a relatively general immunosuppressive agent. B. suppresses T cell proliferation. C. activates macrophages. D. stimulates antibody production. E. is a relatively general immunosuppressive agent AND suppresses T cell proliferation.
Based on molecular analyses, scientists now believe the domestication of the closest relatives of modern dogs began
between ____ years ago.
a. 800 and 1,200 b. 1,000 and 3,000 c. 4,000 and 8,000
d. 9,000 and 12,000 e. 18,800 and 32,100
Is the grey pigment controlled by the same gene as the red pigment?
a. Yes b. No
Drones are male honeybees that
A) build the hexagonal cells of wax for the larvae. B) mate with the queens. C) forage for food. D) feed the developing larvae.