A process where different microbial taxa work in cooperation to degrade a compound that neither can perform entirely on their own is called
A) allotrophy.
B) ammensalism.
C) commensalism.
D) syntrophy.
Answer: D
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One important difference between the C, N, and S cycles and the P, Ca, and Si cycles is that
A) P, Ca, and Si are NOT cycled in terrestrial environments. B) the P, Ca, and Si cycles do NOT involve redox changes or gaseous forms that can alter Earth's atmospheric chemistry. C) the P, Ca, and Si cycles do NOT involve microbial activity. D) the P, Ca, and Si cycles are NOT affected by global warming or other human activity.
A new species of mouse is discovered that can sprint extraordinarily rapidly but also fatigues quickly. How would you expect its muscle composition to compare to that of an ordinary house mouse?
A. more slow oxidative fibers B. more slow glycolytic fibers C. more fast oxidative fibers D. more fast glycolytic fibers E. fewer fast glycolytic fibers
In vitro irradiation of macromolecules causes _____ damage to macromolecules.
a) repairable b) reversible c) irreversible d) both repairable and reversible
Graves' disease is an example of which of the following type II hypersensitivity cytotoxic reactions?
A) Antibodies directly recruit leukocytes to lyse tagged extracellular cells B) IgM binds to nonsoluble antigens on the surface of a cell causing complement cascade activation to lyse cells. C) Antibodies interact with a cell-surface receptor on self-cells causing the inactivation of the receptor. D) IgG binds to nonsoluble antigens on the surface of a cell causing complement proteins to opsonize the target, thereby tagging it for phagocytosis. E) Antibodies interact with a cell-surface receptor on self-cells causing the overactivation of the receptor.