The evolution of many species from a single common ancestor is called
a. adaptive radiation
b. punctuated equilibrium
c. genetic drift
d. disruptive selection
e. microevolution
A
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During the 1968 Olympic Games, the International Olympic Committee performed an analysis of ____ on all female
athletes in order to verify their sex. a. Barr bodies b. hormone levels c. karyotypes d. genitalia e. phenotypes
Control of human reproduction to achieve a societal goal is called
A) biogenics. B) eugenics. C) biodiversity. D) natural selection.
Our skin has over 200 types of yeast, protozoa, and bacteria on its surface. How do these normal flora act as a protective barrier to pathogens?
What will be an ideal response?
Which chemicals are the main ozone destroyers?
a. sulfur oxides b. nitrogen oxides c. chlorofluorocarbons d. polychlorinated biphenyls e. hydrocarbons