The genetic variability produced by meiosis is adaptive in that it ________.
A. creates only gametes with the genes most likely to promote survival in a new environment
B. selects genes only from the parent whose genes are responsive to environmental changes
C. produces genes with more favorable ratios of adenine to guanine and cytosine to thymine
D. makes it likely that at least some individuals will survive as the environment changes
Answer: D
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When explaining the cause of obsessive-compulsive disorder, a psychologist who supports a cognitive-behavioral approach would be likely to make which statement?
a. "Excessive use of defense mechanisms helps the person redirect his or her unacceptable impulses into more acceptable behaviors.". b. "Thoughts and actions that reduce anxiety are done repetitively.". c. "Some individuals' personalities need high levels of autonomic nervous system arousal, and repetitive thoughts and behaviors satisfy that need.". d. "Certain thoughts and actions are the result of abnormal activity in particular brain centers.".
Mark has been having some lapses in memory and he finds that he cannot always explain himself verbally. He toldhis wife, Allison, that he was going to the store for a few items, and came home 3 hours later. He told Allison thathe got lost on the way back and could not remember his address. When Allison asked him to go see their doctor tofind out what might be going on, he shouted at her-something he had rarely done in their 40 years of marriage.What is a possible explanation for Mark's behaviors?
A. Mark is tired and stressed out. B. Mark has the early stages of arthritis. C. Mark has Alzheimer's disease. D. Mark has psychohistorical anxiety.
The semantics of the sentence "He ran" refer to its __________.
A. sound B. meaning C. comprehension D. syntactic structure
The cerebral cortex is undifferentiated from the spinal cord until:
A) the first month after conception B) the beginning of the second trimester C) the beginning of the first trimester D) about three months after birth E) shortly before birth