Structures and Evolution

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

• vestigial structures
• analogous structures
• homologous structures
• fossil structures

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If modern organisms have a lot of homologous structures, what inference might paleontologists make about those organisms?

• They are reptiles
• One organism evolved from the other.
• The organisms have a common ancestor

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Which is not evidence for evolution?

• many animals have homologous structures due to common ancestry
• Many animals have vestigial structures from an ancestor
• We can observe changes in life forms by observing the fossil record
• All of these are evidence for evolution

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What is a structure that is similar across species?

• vestigial
• homologous
• adaptaion
• variation

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

• evolution
• extinction
• adaptation
• natural selection

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Scientists compare organisms' DNA to support the theory that all species share a common _________________

• separation
• ancestor
• population
• environment

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Which IS NOT used as evidence for evolution?

• Fossils

• Natural Selection

• Early Development/Embryos

• Body Structure/Anatomy

• DNA/Proteins

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What is the study of organisms at the early stages of development?

• DNA studies
• embryology 
• extinction
• fossil record

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