In a town in England, the wings of a local butterfly species had a black and white pattern. Over the years, as air pollution worsened in the town, a coat of black soot often covered everything
From an evolutionary perspective, which of the following is a logical sequencing?
a. Butterflies became blacker because the ones with relatively more black on their wings were most likely to blend in with the sooty background.
b. Butterflies became lighter because the ones with relatively more white on their wings were least likely to blend in with the sooty background.
c. Butterflies became more aggressive because their behaviors were altered by the toxins that were in the black soot.
d. Butterflies morphed into moths because environmental conditions triggered an unfolding of a hidden gene.
Answer: A
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Huntington's chorea is
a. usually first expressed when the affected person is between 30 and 40 years of age. b. caused by homozygous recessive lethal genes. c. caused by the inability to produce the proper balance of amino acids. d. associated with mania as well as with violent and aggressive behaviors. e. associated with excessive genetic material in chromosome 21.
Selma notices that as her supply of marijuana decreases she starts thinking more and more about where she can get another supply as well as feeling nervous and anxious. This is an example of
a. withdrawal. b. tolerance. c. physiological dependence. d. psychological dependence. e. intoxication.
Skinner's box:
a. contained a bar/key that the cat could manipulate to obtain a reward. b. used punishment to decrease the occurrence of an undesired behavior. c. contained a bell and a tool to measure salivation. d. videotaped the cat's behavior in its natural environment.
In a Vygotskian classroom, as a child's competence increases, the adult
A) guides and supports the child by modeling the task. B) introduces the child to a new activity. C) enters the zone of proximal development by taking over the child's task. D) steps back, permitting the child to take more responsibility for the task.