Ch. 16 and 17 Darwin and Evolution

When all of the organisms of a species have died it is called

• evolution
• extinction
• adaptation
• natural selection

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What is suggested by the similarity of early embryos of different species of vertebrates?

• no evolutionary relationships between the groups

• recent common ancestry

• similar environments in the past

• evolution from a distant common ancestor

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Some organisms that share a common ancestor have features that have different functions, but similar underlying structures. These are known as

• vestigial structures

• analogous structures

• homologous structures

• fossil structures

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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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The hind leg bones in a whale are examples of

• homologous structures
• analogous structures
• fossils
• vestigal structures

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What is another name for natural selection?

• survival of the smartest
• survival of the fastest
• survival of the biggest
• survival of the fittest

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What is an inheritable change in an organism that allows for it to survive in its environment?

• homologous

• vestigial

• variation

• adaptation

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Homologous structures demonstrate

• more recent common ancestor

• similar underlying structure

• similar function

• change through use and disuse

• adaptation to fill a similar niche

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

• homologous structures

• analogous structures

• vestigial structures

• embryology

What does Darwin's theory of evolution suggest?

• species change over time
• extinct species are not related to living species
• different species can interbreed
• animals that look alike are most closely related

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