Evolution quiz

Happens only in small populations, and is the change in the frequency of a gene variant (allele) in a population due to random sampling of organisms.

• Extinction
• Genetic Drift
• Bottleneck Effect
• Founder Effect

Which of the following is true?

• Gene pool frequencies do not change as a result of migration in or out of a population.
• Gene flow occurs only as a result of isolation of a small population.
• Gene flow can cause new alleles to enter a population's gene pool.
• Gene flow is due the the selection of the most favorable traits.

Occurs when stable environment favours the intermediate phenotype

• Directional selection

• Disruptive selection

• Stabilizing selection

• Inbeeding

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A balanced polymorphism exist through disruptive selection in seed cracker finches from Cameroon in which small and large billed birds specialized in cracking soft and hard seeds, respectively. If long term climatic change resulted in all seeds becoming hard, what type of selection would then operate on the finch population?

• Sexual selection

• Stabilizing selection

• Directional selection

• Disruptive selection

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Occurs when environmental conditions fluctuate between two opposite extreme values.

• Artificial selection

• Distruptive selection

• Directional selection

• Stabilizing selection

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Female water frogs tend to be attracted to the males with the loudest and most distinctive mating call (an acoustical display).

• directional selection

• stabilizing selection

• disruptive selection

• artificial selection

• sexual selection

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______ _________ explains how two or more organisms could evolve similar traits even though they are not related to each other.

• convergent evolution
• reproductive isolation
• derived characters
• hybrid vigor

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Fossils sometimes show that a single species or a small group of species has evolved into diverse forms that live in different ways. An example of this would be a group of present-day mammals all having a common ancestor.   Which term describes this phenomenon?

• adaptive radiation
• convergent evolution
• gradualism
• mutualism

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this?

• behavioral isolation
• temporal isolation 
• gametic isolation
• geographic isolation 

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Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are beginning to only mate with the type of males with the tail they prefer. What type of reproductive barrier is this?

• behavioral isolation
• hybrid sterility 
• temporal isolation
• mechanical isolation 

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