By definition, extreme halophiles require at least ________ M NaCl

a. 0.1
b. 1.5
c. 5
d. 10


Answer: B

Biology & Microbiology

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Sponges are mostly found in ________.

A. fresh water ecosystems B. marine ecosystems C. both marine and fresh water ecosystems D. neither marine nor fresh water ecosystems

Biology & Microbiology

A prescription medication lists a rare side effect of impairing the movement of smooth muscle. This medication could potentially affect the:

A) walls of the small intestine. B) heart. C) muscles that move your arms and legs. D) muscles that move the eyeballs.

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Four of the five actions listed below are mediated by

the same hormone. Select the exception. a. activates vitamin D b. induces reabsorption of calcium by the kidney c. induces release of calcium and phosphate from bones d. regulates blood volume e. involved in the negative feedback control of extracellular calcium level

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What is host plant resistance?

A. The ability to prevent herbivory through various defenses. B. The ability of plants to grow taller than their competitors. C. A form of crypsis practiced by tropical rain forest plants. D. Producing large quantities of seeds in some years. E. The secretion of chemicals that are toxic to competing plant species.

Biology & Microbiology