Evolutionary Mechanisms

All rabbits living in a particular area would be an example of a(n)

• population
• species
• fossil
• individual organism

"Survival of the Fittest" describes which theory

• a) natural selection
• b) gravity
• c) heredity
• d) string theory

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Modern whales developed their traits through natural selection.  What occurs during the process of natural selection?

• Organisms choose mates from other species to create new species
• Breeders selectively cross organisms with desired traits
• Only the fittest organisms can survive and reproduce
• Organisms remain exactly the same over time.

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

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The difference in the physical traits of an individual from those of other individuals in a group is called a(n)

• change
• adaption
• species
• variation

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The ability of an organism to survive and reproduce is known as...

• Adaptation
• Trait
• Fitness
• Variation

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Any variation that can help a species survive in a given environment is called...

• an adapatation
• a characteristic
• a homologous structure
• a vestigial structure

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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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Which of the following means "genetic change over time"

• natural selection
• speciation
• evolution
• fitness

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What type of selection is depicted in the picture? 

• stabilizing 
• directional 
• disruptive 
• the answer is not here

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