HIV is a(n) ______.
A. RNA virus that secretes an enzyme that injects its own RNA into DNA inside the cells that it infects
B. virus that has two stages
C. condition with low numbers of CD8 cells and higher than average numbers of CD4 cells
D. condition where the patient always experiences "flu-like" symptoms
Answer: A
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A participant is asked to report every time he or she sees a faint light. If rewards are offered for correctly reporting the presence of the light, but no punishment for reporting it when it is absent, the participant will make many hits but also many ____________________
Indicate whether the statement is true or false
A baby who is fussy and fearful of new situations has a ____ temperament.
A. negative B. difficult C. slow-to-warm-up D. pessimistic
One reason that low-SES kindergarteners have vocabularies only one-fourth as large as those of their higher-SES agemates is that they
A) rely on infant-directed speech. B) do not use telegraphic speech. C) are read to less often. D) have more verbal stimulation in their homes.
Specific phobia is BEST defined as fear of ______.
a. a particular object or situation b. having a panic attack c. evaluation by others d. inescapable situations