A structure used in rapid escape or pursuit is

indicated by letter
a. A.
b. B.
c. C.
d. D.
e. E.


Answer: b

Biology & Microbiology

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A plant’s response to the relative lengths of light and dark periods in its environment during each 24-hour period is a

phenomenon called ____.

a. gravitropism b. photoperiodism c. thigmotropism d. circadian rhythms e. phototropism

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The acetylcholine receptor is a ligand-gated channel that produces

A. Depolarization by allowing K+ ions to leave the muscle fiber. B. Depolarization by allowing Cl- ions to enter the muscle fiber. C. Depolarization by allowing Na+ ions to enter the muscle fiber. D. Hyperpolarization by allowing Na+ ions to exit the muscle fiber. E. Repolarization by activating second messenger systems within the muscle fiber.

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In which organ does the smooth ER inactivate drugs and harmful metabolic byproducts?

a. brain b. kidney c. liver d. heart e. spleen

Biology & Microbiology

Which pair matches the correct macromolecule with the bond that joins its subunits?

a. protein?ester linkage b. steroid?peptide bond c. polysaccharide?peptide bond d. triacylglycerol?glycosidic linkage e. nucleic acid?phosphodiester linkage

Biology & Microbiology