When conditions are right, many new species may develop in a relatively short period of time from a single ancestor. Such short bursts of evolutionary activity are called
A) gene flow.
B) adaptive radiation.
C) the founder effect.
D) population explosion.
E) genetic drift.
B
Biology & Microbiology
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Carboxydotrophic bacteria oxidize carbon monoxide to
A) carbon dioxide. B) methane. C) acetate. D) glucose.
Biology & Microbiology
Cilia are part of the protective barrier located in the:
A. respiratory tract. B. skin. C. stomach. D. genitourinary tract.
Biology & Microbiology
When the egg leaves the oviduct, it normally passes directly into the
A. abdominal cavity. B. ovary. C. uterus. D. vas deferens.
Biology & Microbiology
Which of the following could be an agent of natural selection?
A. accidental death of cows by lightning strikes B. insects that are eaten after they have reproduced C. characteristics of female animals that cause males to avoid them D. increases in the population size
Biology & Microbiology