Vacuum extractors
A) are used in nearly 30 percent of U.S. births.
B) are more likely than forceps to tear the mother's tissues.
C) have been rapidly replaced by forceps in most U.S. births.
D) doubles the risk of bleeding beneath the baby's skin.
Answer: D
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a. Working memory c. Resistance to interference b. Executive function d. Memory span
The active ingredient in marijuana is
A) PCB. B) THC. C) LSD. D) PCP.
It is difficult to isolate the precise damage caused by illegal drugs during pregnancy because __________
A) most drug-using mothers refuse to participate in teratology research B) the majority of babies born to drug-using mothers do not survive for more than a few days C) most drug-using mothers quit using illegal drugs during the first trimester of pregnancy D) drug users often take several drugs, display other high-risk behaviors, and suffer from other stresses
The positive symptoms of schizophrenia are identified by their
a. absence of normal behavior. b. presence. c. changing nature. d. unchanging nature. e. social beneficence.