Giraffes were once either short-necked or long-necked. As soon as vegetation died, the giraffes that had the gene for long necks survived and passed their characteristics on to their offspring. This best illustrates:
a. natural selection
b. social Darwinism
c. psychosocial reproduction
d. the unconscious id
A. Natural selection suggests that the characteristics that promote survival are passed down in a species.
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What is the labor in vain effect?
a. when people spend time trying to learn information that is beyond their current level of knowledge b. trying to teach someone who is not motivated to learn c. working hard to get someone to understand what you are saying only to find out that he or she had the wrong idea all along d. Teaching someone something, only to have him or her forget it soon after
Shawn has been mostly depressed for several years but occassionally shows hypomania. Shawn would most likely be diagnosed with disorder
a. bipolar I b. bipolar II c. persistent depressive d. major depressive