From the twentieth week until birth,
A) brain weight increases tenfold.
B) glial cells decrease at a rapid rate.
C) the fetus is viable.
D) brain growth slows.
Answer: A
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When a happy person makes and holds an angry look, he or she will probably notice
a. that "making faces" can affect the autonomic nervous system. b. nothing, although he or she will feel the changes in his or her facial muscles. c. little change in emotion, unless there is a placebo effect. d. that emotion is physiological and is not affected in any way by facial expressions.
Homozygous is to __________ as heterozygous is to __________
a. different; same b. similar; different c. fraternal; identical d. same; different e. one; two
Before Jonas Salk discovered a vaccine to prevent polio, people noticed a correlation between outside temperature and the incidence of polio: The warmer the temperature over the course of the year, the more outbreaks of polio
This relationship is an example of a(n) ________ correlation. a. negative b. positive c. spurious d. illusory
________ are representations in the mind of an object or event.
Fill in the blank(s) with the appropriate word(s).