Chapter 22 - The Origin of Species

Ducks and beavers both have webbed-feet.

• allopatric speciation

• divergent evolution

• convergent evolution

• coevolution

• sympatric speciation

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There are species of lizards that burrow underground. Gophers and moles are mammals that also burrow underground.

• allopatric speciation

• divergent evolution

• convergent evolution

• coevolution

• sympatric speciation

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In convergent evolution, organisms share physical similarities because they 

• have a common ancestor
• live in the same enviornment
• develop homologous structures
• are closely related 

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• The image shows analogous structures.

• The image shows convergent evolution.

• The image shows divergent evolution

• The image shows organisms that are not closely related.

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• The image shows convergent evolution. 
• The image shows divergent evolution. 
• The image shows adaptive radiation.
• The image shows analogous structures.

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• The image shows convergent evolution.

• The image shows divergent evolution.

• The image shows adaptive radiation.

• The image shows homologous structures.

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• The image shows convergent evolution.

• The image shows divergent evolution.

• The image shows adaptive radiation.

• The image shows homologous structures.

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What happens in divergent evolution? 

• organisms become more similar
• organisms become less similar
• species become more related
• adaptive radiation always occurs

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What is the most correct definition of evolution?

• Change over time. 
• Animals changing over time. 
• Organisms changing over time.
• Species changing over time. 

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What is the correct defintion of a species?

• Same type of organisms living in an area.
• Same type of organisms that can reproduce.
• Organisms that can reproduce and fertilize offspring.
• Organisms that can reproduce and have fertile offspring.