Evolution Review

Which term describes the variety of living things in an ecosystem?

• biodiversity

• fitness

• evolution

• reproductive isolation

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According to Darwin, why does evolution occur?

• Organisms with the best adaptations survived and passed on those traits to their offspring.

• Organisms develop adaptations when needed and pass those adaptations to their offspring.

• Organisms with lower fitness pass on their adaptions to their offspring.

• Organisms only evolve new adaptations when they create a new species of offspring.

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The cave fish and minnow are related to each other; however, the cave fish is blind and only has the remnants of an eye. If the eye is no longer usable, it is an example of what type of structure?

• homologous
• analogous
• vestigial
• convergent

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According to this data, which species is most closely related to the unknown species?

• Species I
• Species II
• Species III
• Species IV

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Which rock layer contains the oldest fossils?

• F

• B

• C

• D

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What is a species? 

• A group of organisms that can mate with each other and produce fertile offspring. 
• Closely related organisms that compete for similar resources.

• Organisms that have similar traits due to convergent evolution (example: bats and birds both have wings)

• All the organisms that live in the same environment. 

When female chimps reach reproductive maturity, they leave the troop they were born into and join another troop. This is an example of which evolutionary force?

• gene flow

• sexual selection

• genetic drift

• natural selection

• mutations

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Which of the following statements describes an example of artificial selection?

• Cichlids have diversified into nearly 200 species in Lake Tanganyika

• Thoroughbred racehorses have been bred for speed

• Whales have evolved tails that help propel them through water

• Darwin's finches have beak adapted to eating different foods

Which of the following is TRUE about genetic drift?

• It increases the genetic variation in a population.

• It happens more often in larger populations.

• It causes one allele to become more common than others due to random chance.

• It occurs when organisms move from one population to another.

Which of the following can produce new alleles in a population?

• gene flow

• genetic drift

• natural selection

• sexual selection

• mutations

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