Evolution

Why are vestigial structures evidence for evolution?

• They are useful in the organism and show natural selection at work.

• They are not useful in the organism but they were probably useful in some ancestor of that species.

• They show that these organs or behaviors help an organism adapt to new environments

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Change over time is

• evolution

• generation

• growth

• biogenesis

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Natural selection is

• survival of the fittest

• humans change

• two species are the same

• more animals survive

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This makes an organism more suited to its environment

• species

• lifespan

• adaptation

• mutation

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To adjust to a changing environment

• Mutation

• Adapt

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Where humans have bred organisms together based on traits we like.

• Evolution

• Natural Selection

• Extinction 

• Artificial Selection

Bird wings and butterfly wings are an example of

• Homologous structure

• Analogous structure

• Camaflouge

• Mimicry

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A mistake or change that occurs in the DNA sequence is called a ______________________.

• Extinction

• Speciation

• Mutation

• Genetic Variation

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Why don't all living things become fossils?

• because some living things are too big

• because some are subject to catastrophism and others are not

• because environmental conditions have to be just right (for formation & to prevent decay)

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Change over time...

• Evolution

• Nucleotide 

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