Mechanisms of Evolution

During gestation (pregnancy), a developing male pig had a change in his genetic code. The result was that he was able to walk and do karate.

• Genetic Drift
• Non-random mating
• Mutation
• Natural Selection

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Five hundred years after the deer had established a flourishing population in the park, a few of them venture back to their original woods and have babies with the deer there.

• Genetic Drift
• Mutations
• Non-random mating
• Gene flow

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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.

• Mutation
• Natural Selection
• Genetic Drift
• Gene Flow

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7 Wild Mustangs were taken from the prairies of Iowa after a Texan Rancher purchased them and provided them with their own pasture. Those 7 Mustangs eventually became 122.

• Genetic Drift (small popultaion)
• Non-random mating
• Gene flow
• Mutations

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What does the image represent?

• Founder effect
• Bottleneck effect
• Natural Selection
• Mutations

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Which organisms are most likely to survive?

• the best adapted
• the fastest
• the strongest
• the most domesticated (tamed)

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Gene Flow tends to ___________ genetic variation (diversity)

• Increase
• Decrease
• Stabilize
• Exaggerate 

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Evolution by chance, survival of the luckiest:

• genetic drift

• sexual selection

• fitness

• coevolution

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Mutations are important because they bring about

• death of the organism in which they develop
• genetic variation needed for a population to evolve
• benefits for the individual, not for the population
• Hardey-Weinberg equilibrium within a population

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Survival of the fittest or when favorable adaptations reproduce faster is called what?

• Evolution
• Adaptation
• Natural selection
• Fossilization

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