In general, in a population in which a trait is exposed to stabilizing selection over time:
a) the mean increases and variation decreases.
b) the mean increases and variation increases.
c) the mean stays approximately the same and the variation decreases.
d) the mean changes and the variation decreases.
e) the mean stays approximately the same and the variation increases.
Ans: c) the mean stays approximately the same and the variation decreases.
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into the tube foot.
a. ampulla b. ossicle c. radial canal d. ring canal e. madreporite
The size of a population depends on its rates of births, deaths, __________, and __________. Fill in the blank(s) with the appropriate word(s)
After a week of asymptomatic infection with Bordetella pertussis, the patient has cold-like (catarrhal) symptoms for a week or two followed by a period of severe paroxysmal episodes of coughing that leave the patient anoxic and fatigued.
Answer the following statement true (T) or false (F)
Paedomorphosis may involve:
a. acceleration or hypermorphosis. c. acceleration or neotony. b. progenesis or neotony. d. progenesis or hypermorphosis.