____ selection occurs when individuals choose mates with a particular desirable trait
a. Stabilizing
b. Sexual
c. Artificial
d. Asexual
e. Disruptive
ANSWER: b
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Evolution, viewed on a small scale, as it relates to changes in a single gene or allele frequency in a population over time, is called
A. macroevolution. B. speciation. C. genetic evolution. D. phenotypic evolution. E. microevolution.
The term that refers to the purposeful addition of microorganisms into a laboratory nutrient medium is ________.
A. immunization B. isolation C. contamination D. infection E. inoculation
Which of the following is true of all animals?
1.All animals exhibit bilateral symmetry. 2.All animals are multicellular and heterotrophic. 3.Protostomes have a coelom but deuterostomes have a pseudocoel. 4.Animals most likely evolved from cyanobacteria.
Blue-footed boobies have webbed feet and are comically clumsy when they walk on land. Evolutionary scientists view these feet as
A) an example of a trait that is poorly adapted. B) the outcome of a trade-off: Webbed feet perform poorly on land but are very helpful in diving for food. C) an example of a trait that has not evolved. D) a curiosity that has little to teach us regarding evolution.