On occasion, a stressful factor such as disease, starvation, or drought kills a large proportion of the individuals in a

population, producing ____ that dramatically reduces the population size.



a. natural selection
b. artificial selection
c. a lethal mutation
d. a founder effect
e. a population bottleneck


ANSWER: e

Biology & Microbiology

You might also like to view...

The United States is most likely to have a pyramid-shaped age structure because it has more older individuals than young ones.

a. In West Africa b. In Southeast Asia c. In Western Europe d. In the Middle East

Biology & Microbiology

A pinniped is observed as lacking external ears, and it appears to propel through the water using its hind flippers only. What kind of pinniped might this be?

a. Phocids b. Sirenia c. Eared seals d. Walruses

Biology & Microbiology

Eyes contain ____

A. chemoreceptors. B. mechanoreceptors. C. photoreceptors. D. nociceptors. E. thermoreceptors.

Biology & Microbiology

If you forgot the decolorization step while performing a Gram stain, which outcome would you expect?

A. Gram-positive bacteria would be unstained B. Gram-negative bacteria would stain purple C. Gram-positive bacteria would stain pink D. Gram-negative bacteria would be unstained

Biology & Microbiology