The atmospheric pressure at sea level is
a. 1,000 mm Hg.
b. 760 mm Hg.
c. 540 mm Hg.
d. 400 mm Hg.
e. 320 mm Hg.
B
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Which plant hormone will cause the stomata to close?
a. Ethylene b. Auxins c. Cytokinins d. Abscisic acid e. Gibberellins
Acceleration or head movements cause the fluid in the vestibular apparatus to stimulate action potentials by ________
a. bending cilia on mechanoreceptors b. binding to axons of sensory receptors c. bending hair cells against the organ of Corti's tectorial membrane d. putting pressure on Pacinian corpuscles
For your eye to focus on this sentence, the ciliary muscle would need to:
a. contract for the lens to get rounder. b. contract for the lens to get flatter. c. relax for the lens to get rounder. d. relax for the lens to get flatter. e. relax to thin out the lens.
How do enveloped animal viruses exit their host?
A. bursting the host cell B. rupturing the virus C. budding or exocytosis D. endocytosis