________ twins are individuals who originate from the same zygote, a single egg fertilized by one sperm that separates to form two cell masses
a. Dizygotic c. Identical
b. Fraternal d. Concordant
C
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The greater the extent of nursing home care, the less amount of adjustment is required by the resident.
Answer the following statement true (T) or false (F)
Reinforcing consequences that people receive in their daily lives are called _____ reinforcers
a. natural b. in vivo c. social d. environmental
The key idea behind the trichromatic theory of color vision is that:
a. the retina contains three kinds of color receptors b. increased activation of one type of color cell will decrease activation in another c. ganglion cells encode most aspects of color d. each hemisphere of the brain processes color differently
Which of the following statements most accurately describes the relationship between testosterone and male sexual frequency?
A. Sexual frequency and testosterone levels are strongly correlated for men of all ages. B. Sexual frequency is positively correlated with testosterone levels in young men but not in older men. C. Sexual frequency is positively correlated with testosterone levels in older men but not as much in younger men. D. Sexual frequency shows a zero correlation with testosterone levels in men of all ages.