Evolution and Natural Selection Practice Quiz

Structures with the same parts have different functions; suggests that organisms share a common ancestry

• vestigial structures
• homologous structures
• adaptive radiation
• fossil

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If an organism has a vestigial structure, that structure likely once had a function in a(n)

• close relative
• early ancestor
• unrelated organism
• embryological stage

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The process by which populations slowly change over time is called__________

• selective breeding
• adaptation
• sepeciation
• evolution

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Study of embryos of various organisms to show a common ancestor because of similarities in development

• natural selection
• embryology
• speciation
• evolution

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Structures that have the same function but different structures are...

• homologous structures
• analogous structures
• vestigial structures
• embryology 

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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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Whales are aquatic mammals that contain a pelvis bone.  Even though it does not aid in its movement, the function must have been used by a common ancestor of the whale.  Thus, the pelvis is referred to as a(n)

• vestigial structure
• analogous structure
• homologous structure

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According to the diagram, which bird has the most similar DNA to a large tree finch?

• small tree finch
• medium tree finch
• large ground finch 
• green warbler finch

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The average otter has slight webbing on its paws to assist in gliding through water. Unfortunately, a group of otters' habitat has recently dried up, decreasing the need for webbing. Over many generations, the webbing has lessened. This is:

• Stabilizing Selection

• Directional Selection

• Disruptive Selection

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A group of finches has survived for years on medium sized seeds; because of this, they have evolved to have medium-sized beaks. In recent years, medium sized seeds have been on the decline, and the beaks will adjust accordingly. This is an example of:

• Gene Flow

• Founder's Effect

• Directional Selection

• Disruptive Selection

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