Random evolutionary changes in a small breeding population is known as:
a. gene flow.
b. genetic drift.
c. disruptive selection.
d. natural selection.
e. mutation.
B
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Which letter in the figure above corresponds to a large efflux of K+ ions from the cell?
A) A B) B C) C D) D E) E
Which collagen type is most rigid and is very abundant in bones and tendons?
A. Type I B. Type II C. Type III D. Type IV E. Type V
Some of the work with Hawaiian fruit flies illustrated the presence of a
a. prezygotic isolating mechanism, which involved behavioral isolation. b. prezygotic isolating mechanism, which involved gametic isolation. c. prezygotic isolating mechanism, which involved temporal isolation. d. postzygotic isolating mechanism, which involved behavioral isolation. e. postzygotic isolating mechanism, which involved gametic isolation.
Four of the five choices below are white blood
cells that are capable of circulating in the blood. Select the EXCEPTION.
a. neutrophil b. mast cell c. macrophage d. eosinophil e. dendritic cell