Anthony has dark brown eyes, and his sister Samantha has green eyes. It is likely that
a. Anthony's aqueous humor has a different composition than Samantha's
b. Anthony's irises contain a denser blood supply than Samantha's.
c. Samantha's irises contain more melanin than Anthony's.
d. Anthony's irises contain more melanin than Samantha's.
d
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By the end of early adulthood, what is the most prevalent cause of death?
A. suicide B. homicide C. disease D. automobile accidents
In an experiment to study the effects of caffeine on performance, an experimenter asked the male students in an introductory psychology class to drink two regular Pepsis before a test and the female students to drink two caffeine-free Pepsis. She then compared performance of the two groups on the test. A confounding variable in this study is:
a. whether participants had studied for the test. b. the type of drink. c. the gender of the participants. d. the amount of caffeine in the Pepsi.
Boys with authoritarian parents are more often to show ____, whereas girls more often show ____
a. aggressiveness and unruliness; anxiousness and unhappiness b. unhappiness and anxiousness; aggressiveness and unruliness c. personality disorders and low grades; ADHD and high grades d. ADHD and high grades; personality disorders and low grades
What structure is described in your text as the "gray matter" that forms the top portion of the brain?
A) cerebellum B) cerebral cortex C) brain stem D) frontal lobe