In humans, the thirst center is located in the
a. adrenal cortex.
b. hypothalamus.
c. anterior pituitary.
d. glomerulus
B
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A. bivalents are formed during prophase I and are taken apart during anaphase I. B. chromosomes undergo reductional division. C. sister chromatids are not separated. D. nonsister chromatids exchange maternal and paternal DNA. E. All of these choices are correct.
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When Pasteur tested the hypothesis of spontaneous generation, he compared the ability of a sterilized growth medium (meat broth) to produce a population of bacteria in two different types of flasks. One had a simple neck open to the outside, and the
other had a "goose neck" bend that also was open to the environment. Pasteur expected that bacteria would appear in the flask with the standard neck. In this experiment, the standard neck flask served as a/an: A) statistic. B) variable. C) control. D) observation. E) hypothesis.