What causes the impaired fetal development induced by rubella?
A) The virus induces key cells to form a 23rd chromosome.
B) toxins produced by the rubella virus
C) alteration of chromosome number by the virus
D) induction of an error of metabolism within key brain cells
E) deletion of key enzymes within the brain
Answer: B
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Nate is watching the cumulative recorder that is connected to a box where a rat is pressing a lever to receive food reinforcement. The slope of the line is becoming flatter and flatter over time. Based on this output, Nate can conclude that the rat's response rate
a. is increasing over time. b. will soon show spontaneous recovery. c. is decreasing over time. d. is caused by inadequate stimulus generalization.
Which of the following statements is true regarding teenagers as they progress through adolescence?
A) Their self-concepts become more concrete. B) Their self-concepts are increasingly tied to their physical characteristics. C) They increasingly define themselves in terms of enduring traits, beliefs, moral standards, or personal philosophies. D) They are increasingly dependent on their parents for their identity.
According to the text, the decade of the 1990s was labeled by President George H. W. Bush as "the decade of ____________."
a. the genome b. evolution c. the brain d. natural selection
As it relates to clarity of vision, or visual acuity, a newborn’s vision is most clear at a distance of
a) 1-3 inches b) 4-7 inches c) 8-14 inches d) 15-24 inches