Worldwide declines in the population size of frogs have recently been linked to ____
a. overharvesting
b. a fungus
c. dams
d. decreases in global temperatures
e. increases in precipitation
ANSWER: b
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Which of the following is NOT a correct match?
a. hydrosphere; ice caps b. lithosphere; airborne particles c. atmosphere; gases d. hydrosphere; rivers e. lithosphere; Earth’s crust
The most dangerous arrhythmia is
a. ventricular tachycardia. b. ventricular bradycardia. c. ventricular flutter. d. atrial fibrillation. e. ventricular fibrillation.
In Experimental Condition 2 of the accompanying figure, the distribution of Chthamalus suggests that:a
interspecific competition kept Chthamalus from extending lower into the intertidal area. b. intraspecific competition kept Chthamalus from extending lower into the intertidal area. c. a limiting factor kept Chthamalus from extending lower into the intertidal area. d. a barnacle parasite kept Chthamalus from extending lower into the intertidal area. e. predation kept Chthamalus from extending lower into the intertidal area.
Which cells produce specific antibodies?
A. Macrophages B. Monocytes C. T cells D. B cells E. Plasma cells