Evidence for

A Theory is more than a guess: valid experimentation, similar results, a community of scientists laboring together over time.

Types of Evidence

• Direct and Indirect
• Direct = observable changes over time
• Indirect = changes seen in evidence coupled with logical deduction

To observe evolution directly, you need to see the change that occurred from one species to another.

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Indirect Evidence

• We can make logical deductions by looking to:
• Fossils
• Structural homologies
• Molecular Homologie

Structural Homologies

• We can find similarities in:
• Bone structures
• Organs
• Physical structure
• The way we develop

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Molecular Homology

• We can experimentally observe similarities in:
• Chemical processes
• Enzymes
• DNA sequences!

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