In DNA, adenine is paired with ____ and cytosine with ____
a. thymine? simple sugar
b. thymine? guanine
c. guanine? simple sugar
d. guanine? thymine
b
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With which of the following tasks would older adults have the LEAST problems?
a. A memory task where the material is unfamiliar b. A task where they are asked to recall rather than recognize names c. A memory task where they can use well-practiced memory strategies d. A timed memory task
According to Darwin, evolution resulted from the ____ of those accidental variations that proved to have survival value.?
a. ?natural selection b. ?sharing c. ?inhibition d. ?extinction
Which of the following is a characteristic of Rett's disorder?
A. The loss of previously acquired skills, such as the ability to walk and to communicate after three years of apparently normal development B. Stereotyped behavior from birth C. A loss of hearing at birth D. A range of physical, behavioral, motor, and cognitive abnormalities that begin after a few months of normal development
Unlike functional magnetic resonance imaging (fMRI), near-infrared spectroscopy (NIRS) ________.
A. enables identification of general regions of stimulus-induced activity B. detects changes in electrical brain-wave activity in the cerebral cortex C. is appropriate for infants and young children, who can move within a limited range during testing D. records the frequency and amplitude of brain waves in response to particular stimuli