The outcome of the conflict between bacteria and bacteriophage at any point in time results from
A) frequency-dependent selection.
B) evolutionary imbalance.
C) heterozygote advantage.
D) neutral variation.
E) genetic variation being preserved by diploidy.
Ans: A) frequency-dependent selection.
You might also like to view...
The process of natural selection results in Select all that apply.
_____ Extinction. _____ Random genetic mutations. _____ Adaptation. _____ Speciation.
Female preference for brightly colored blue or
red males in Lake Victoria provides an example of
a. sympatric speciation. b. sexual selection. c. allopatric speciation. d. behavioral isolation. e. a combination of more than one of these.
Which of the following areas is not associated with the frontal lobe?
A. motor speech (Broca's) area B. premotor area C. prefrontal area D. primary visual area E. primary motor area
In radishes, two incompletely dominant genes control color and shape. Red (R) is dominant over white (r), and heterozygotes are purple. Long (L) is dominant over round (l), and heterozygotes are oval. If a true-breeding long, red radish is crossed with a purple oval radish, give the F1 phenotypes and their percentages.
A. All long red B. 25% long red, 25% long purple, 25% oval red, 25% oval purple C. 25% long red, 50% round purple, 25% round white D. 25% long red, 50% long purple, 25% oval white E. 25% oval red, 25% oval purple, 50% round purple