Lucy was a member of which species?
a. Australopithecus aethiopicus.
b. Homo erectus.
c. Australopithecus afarensis.
d. Homo habilis.
C
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You ask a three-year-old why the sky is blue; she says it is because blue is her favorite color. This answer reflects the ____ thinking that is typical of preschoolers
a. irreversible b. animistic c. egocentric d. operational
An important reason for using random assignment in a study with independent groups is to
a. prevent any systematic differences between groups on extraneous variables. b. be able to generalize to broader populations. c. rule out competing interpretations of any differences we find. d. a and c
Our brain contains billions of __________
a. neurons b. types of chemical transmitters c. types of motor transmitters d. catecholamines
To reinstate female sexual behavior in an ovariectomized rat, estradiol is given, followed by progesterone. How does estradiol prime sensitivity to progesterone?
A. Estradiol binds to progesterone receptors. B. Estradiol promotes additional production of progesterone. C. Estradiol does not impact the sensitivity to progesterone. D. Estradiol increases production of progesterone receptors.