An atom becomes a cation if:
a. it gains one or more electron.
b. it loses one or more electron.
c. it shares electrons.
d. one or more of its electrons changes energy levels.
e. it emits radiation.
B
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The P wave of the ECG represents
A. the depolarization of the atria. B. the contraction of the ventricle. C. the repolarization of the atria. D. the relaxation of the atria. E. the contraction of the atria.
What effect is warming predicted to have on migration behavior?
A) Birds will depart for migration earlier and return later. B) Birds will depart for migration later and return later. C) Birds will depart for migration earlier and return earlier. D) Birds will depart for migration later and return earlier.
Staphylococcal ________ are relatively heat-stable, so they maintain pathogenicity in warm food and are even stable to stomach acidity
a. amylases b. enterotoxins c. lysins d. proteases
Low body temperature triggers adaptive responses to conserve heat. Once the integrating center detects that body temperature has risen, it will decrease these responses. What is this an example of?
A. Adaptation B. Positive feedback C. Negative feedback D. Acclimatization