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Evidence of Evolution Part II What you should know for your Test III essay!
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Theory of Evolution All life on Earth descended from a common ancestor Life originated as a simple form, and became more diverse and complex over time
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Evidence in Organisms “Evolution proceeds by modifications of organisms which already exist”
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Evidence in Organisms I.Homologous Structures * Definition * Examples (Describe in detail!)
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I. Homologous Structures
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Homologous Structures
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Why evidence of evolution?
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Evidence in Organisms II.Similarities in Embryonic Development All animals: cleavage, morula, blastula, layering after blastula (gastrula)All animals: cleavage, morula, blastula, layering after blastula (gastrula) All Vertebrates: What did you observe?All Vertebrates: What did you observe? C-shape, big eyes, tails, gill slits, limb buds, etc.
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Similarities in Embryonic Development How evidence of Evolution?
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Evidence in Organisms III. Vestigial Structures definition:definition: Examples:Examples: How evidence of evolution?How evidence of evolution?
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Evidence in Organisms What evidence suggests that life forms today share a common ancestor? Animal life: –Bone homology –Embryological comparisons All life: –Biochemical evidence DNA/Proteins Energy reactions
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II. Evidence in Organisms Evidence that Life forms change over time Vestigial Structures –Definition –Examples Artificial Selection Peppered Moth
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