Evolution Natural Selection

What type of structures are these?

• homologous

• vestigial 

• analogous

• fossil

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The differences among a species, like different bird beaks, are called

• genes.

• variations.

• traits.

• theories.

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Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation

• Adaptation

• Behavior

• Environment

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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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What is this an example of?

• Homologous structure

• Analogous structure

• Vestigial organs

• Functional adaption

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An anatomical feature that no longer seams to have a purpose in the current form of an organism

• Homologous structure

• Analogous structure

• Vestigial structure

• None of the above

Ostrich wings are examples of

• homologous structures

• vestigial structures

• adaptations

• traits

Definition: natural selection

• inherited characteristic that increases chances of survival

• organisms with traits well suited to their environment survive and reproduce at a greater rate

• a growing population causes a scarcity of resources

• differences in the DNA sequence

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How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce

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English natural scientist who formulated a theory of evolution by natural selection (1809-1882).

• Darwin

• Wallace

• Linnaeus

• Lamarck

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