Weekly Check 8

Two populations of the same species are separated by land barriers like rivers or mountains.

• geographical isolation

• temporal isolation

• adaptive ratiation

• behavioral isolaton

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According to the theory of natural selection, why are some individuals more likely than others to survive and reproduce?

• Some individuals pass on to their offspring new characteristics they have acquired during their lifetimes.

• Some individuals are better adapted to exist in their environment than others are.

• Some individuals do not pass on to their offspring new characteristics they have acquired during their lifetimes.

• Some individuals tend to produce fewer offspring than others in the same environment.

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Genetic drift is change in the allele frequency of a population due to...

• random chance

• natural selection

• non-random mating (sexual selection)

• artificial selection

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A type of genetic drift in which small groups of organisms separate from a larger population and form new small colonies.

• Gene Flow

• Founder Effect

• Natural Selection

• Artificial Selection

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The exchange of genes between two populations due to migration

• Genetic Drift

• Founder Effect

• Gene Flow

• Genetic Recombination

This is the pattern of natural selection where BOTH of the extreme versions of a trait are more advantageous than the average, so a population evolves in both directions away from the average

• Directional Selection

• Disruptive Selection

• Stabilizing Selection

• Radical Selection

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Yellow toucan birds seek out one another to make babies together and tend to avoid the green toucan birds.

• Nonrandom mating
• gene flow
• mutation
• natural selection

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A few deer wander out of their native woods into a completely new park where no deer had ever been before. They go on to create an entirely new population.

• gene pool 
• founder effect
• bottleneck
• mutation

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Wolves from the Arizona mesa were transferred to the Colorado Rockies after a forest fire destroyed their habitat. They quickly became part of the local pack and had offspring.

• gene flow
• mutation
• nonrandom mating
• adaptation

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Ten years ago, in a small population of ducks, two sizes of eyes were observed, large and small. Three ducks have large eyes and 7 have small.  2 of the large-eyed ducks are randomly hit by cars and killed. Today, no large-eyed ducks are present in the population.

• gene flow
• bottleneck
• mutation
• founders

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