Which of the following statements is true about the role of heredity in physical growth?
A) When diet and health are adequate, heredity has little effect on height and rate of growth.
B) Even if negative environmental influences are not severe, children show little catch-up growth once conditions improve.
C) Twin studies reveal that genetic makeup has little effect on body weight.
D) Genes influence growth by controlling the body's production of and sensitivity to hormones.
D
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Which of the following is TRUE of infant memory?
a. Infants demonstrate memory for experiences they had during the pregnancy (before birth). b. Infants do not demonstrate reliable memory until about 3 months of age. c. Infants can only remember after 6 months of age. d. Infants can memorize things with only one exposure.
______ hypothesis that an effect or relationship exists (or exists in a specific direction) in the population.
A. Null B. Void C. Alternative D. Pseudo
Which of the following is NOT true of neural impulses?
a. The neuron fires in response to every impulse it receives. b. Neural impulses travel at speeds ranging from 3 feet per second to 400 feet per second. c. The incoming message must be above a certain threshold to cause a neural impulse. d. The neuron may fire during the relative refractory period.
Researchers have conducted nearly 300 split cable market tests to assess the effectiveness of advertisements. In these tests, cable viewers are randomly assigned to receive advertisements for new or existing products, and
a. they are interviewed by phone to see if they purchased the products. b. store scanners are used to track their purchasing patterns. c. stores provide them a checklist of commercials and ask if they've seen them. d. researchers come to their homes to do an inventory of their kitchens.