Evidence for Evolution. Agree or Disagree? Evolution occurs in short periods of rapid change in species and is separated by periods of little or no change.

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Presentation transcript:

Evidence for Evolution

Agree or Disagree? Evolution occurs in short periods of rapid change in species and is separated by periods of little or no change.

Models for the tempo of Evolution Punctuated equilibrium- Evolution occurs in short periods of rapid change in species and is separated by periods of little or no change.

Gradualism Gradual change over long period of time leads to new species formation.

Agree or Disagree? Bat wings and penguin fins are similar in structure.

Homologous Structures

Analogous Structures

Vestigial Structures Structures or organs that have lost most of their primary function.

Agree or Disagree? Fossils do not support the theory of evolution because fossils rarely form.

Fossil Record Paleontologists- biologists who study prehistoric life.

Tiktaalik According to the theory of evolution, we should be able to find intermediate between fish and amphibian.

We have the theory lets find the fossil. In 2004 scientists set out to find intermediate between fish and amphibian.

Speciation Reproductive isolation- Condition in which two populations of the same species do not breed with one another