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Exam 12: Processes of Evolution

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Question 21

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With ____ selection(s) ,the forms of a trait at both extremes of a range of variation are favored.

A) frequent
B) directional
C) disruptive
D) stabilizing
E) mutational

F) A) and B)
G) D) and E)

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Question 22

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By the year 1900,the American bison had been hunted to near extinction.From those that survived the slaughter,breeding programs have increased the population of American bison to close to 500,000 today.This is an example of

A) artificial selection.
B) the founder effect.
C) the bottleneck effect.
D) the Red Queen effect.
E) gene flow.

F) A) and B)
G) C) and D)

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Question 23

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Match the evolutionary concepts correctly with the descriptions or examples of the concepts.Matches are not necessarily equal. a.exaptation g.directional selection b.ecological isolation h.disruptive selection c.mechanical isolation i.genetic drift d.behavioral isolation j.founder effect e.sexual selection k.gene flow f.temporal isolation -this type of isolation is most closely related to allopatric speciation

Two species of toads have been successfully interbred in a laboratory but do not hybridize in nature because one species mates in summer and the other mates in the fall.This is an example of ____ isolation.

____ changes the DNA but has no impact upon the individual.

In some species of flowering plants,pollen from unrelated species may germinate on the female stigma,but the pollen tube grows only a short distance and fertilization does not occur.This is an example of ___ isolation.

The migratory patterns of many animals encourage

In a tropical forest some leaves are dark green and some are light green.In a population of caterpillars,homozygous dominant dark green caterpillars thrive eating the green foliage; homozygous recessive light green caterpillars thrive eating light green foliage; heterozygous caterpillars of an intermediate color green are easily seen by birds and eaten,thus there frequency is far less than the dominants or recessives.This is an example of ___ selection.

The movement of alleles among populations is called

With ____ selection(s) ,the intermediate form of a trait is favored.

Gene flow counters the effects of

____ is a drastic reduction in population size brought about by severe pressure.

Finches having either a large bill or a small bill but no sizes in between is an example of ____ selection(s) .

Match the evolutionary concepts correctly with the descriptions or examples of the concepts.Matches are not necessarily equal. a.exaptation g.directional selection b.ecological isolation h.disruptive selection c.mechanical isolation i.genetic drift d.behavioral isolation j.founder effect e.sexual selection k.gene flow f.temporal isolation -this type of isolation is most closely related to sexual selection

One result of the bottleneck affect can be

Match the evolutionary concepts correctly with the descriptions or examples of the concepts.Matches are not necessarily equal. a.exaptation g.directional selection b.ecological isolation h.disruptive selection c.mechanical isolation i.genetic drift d.behavioral isolation j.founder effect e.sexual selection k.gene flow f.temporal isolation -the migration of bison from one herd to another results in this

What organic compound was widely used as a rat poison until 1980?

Match the evolutionary concepts correctly with the descriptions or examples of the concepts.Matches are not necessarily equal. a.exaptation g.directional selection b.ecological isolation h.disruptive selection c.mechanical isolation i.genetic drift d.behavioral isolation j.founder effect e.sexual selection k.gene flow f.temporal isolation -the ear bones of mammals were adapted from the jaw bones of reptiles

Classification.The statements are related to macroevolution.For each one,select the best choice from the following terms. a.stasis b.adaptive radiation c.exaptation d.coevolution e.mass extinction -an example is flowering plants and their pollinators

Which of the following is an example of the result of a beneficial mutation?