Fundamentally, how does natural selection work?
What will be an ideal response?
A good answer will include the following key points:
• In a given species living in a particular environment, some individuals with a genetically influenced trait tend to be more successful than others in finding food, surviving the elements, and fending off enemies—and are therefore better at staying alive long enough to produce offspring.
• As a result, their genes will become more and more common in the population, having been "selected" by reproductive success.
• Over many generations, these genes may even spread throughout the species.
• In contrast, those individuals whose traits are not as adaptive in the struggle for survival will not be as "reproductively fit": They will be more likely to die before reproducing, and their genes—and the traits influenced by those genes—will therefore become less and less common, and may possibly even disappear.
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Passionate love is ____________________ in long-term loving relationships
a. present for the long run b. mostly present after long partnerships c. mostly present at the beginning of partnerships d. largely irrelevant
Researchers have found that bipolar disorder occurs
a. nearly twice as frequently in women as in men. b. nearly four times as frequently in women as in men. c. nearly twice as frequently in men as in women. d. with equal frequency in women and in men.