The difference between results from the subset and
results from the whole is
a. the variable.
b. sampling error
c. the prediction.
d. the control.
e/ the hypothesis.
Answer: b
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The mechanism that regulates the movement of
substances into and out of the cells of the brain is the a. cerebrospinal fluid. b. reticular formation. c. tectum. d. blood-brain barrier. e. brain stem.
The protective covering of the brain is (are) the
a. ventricles. b. meninges. c. tectum. d. olfactory and optic bulbs. e. pineal gland.
A covalent bond is likely to be polar when _____
A) one of the atoms sharing electrons is more electronegative than the other atom B) the two atoms sharing electrons are equally electronegative C) carbon is one of the two atoms sharing electrons D) the two atoms sharing electrons are the same elements
A rise in sodium levels and extracellular volume leads to a rise in blood pressure. As a result, ____.
A. renin levels rise, but aldosterone levels fall B. renin levels fall, but angiotensin levels rise C. renin and aldosterone levels rise D. renin and aldosterone levels drop E. renin levels drop, but aldosterone levels remain the same