Evolution: Darwin, Natural Selection and Evidence

In natural selection, the selective agent is the

• humans
• mutations
• breeders
• environment

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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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What is the term for a feature that allows an organism to survive better in its environment?

• variation

• adaptation

• homologous structure

• vestigial structure

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What is the process in which humans breed organisms for certain traits?

• natural selection
• inheritance
• artificial selection
• descent withOUT modification

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What type of structures are shown?

• Homologous

• Analogous

• Vestigial

• Heterologous

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What type of structures are shown?

• Homologous

• Analogous

• Vestigial

• Heterologous

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What type of structures are shown?

• Homologous

• Analogous

• Vestigial

• Heterologous

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Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

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Which layer is the oldest?

• 1
• 2
• 3
• 4

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Use the diagram and the law of superposition to make a statement about the image.

• The bottom two layers are generally the same age range

• The bottom layer is most likely the oldest and the top layer is most likely the youngest

• The top two layers cannot be determined because of weathering and erosion that may still be occuring

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