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Evidence of Evolution November 3 & 4
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Do Now Take your seat Jot down the four main evidences of evolution – I’ll be coming around to give you a 5-point classwork grade on this!
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Evidences of Evolution Fossils Anatomy Molecular evidence Comparative embryology
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Molecular Evidence DNA is a code made of 4 letters All organisms use DNA This suggests life had one origin!!
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Molecular Evidence We can use similarities in DNA to understand evolutionary relationships between animals
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Are whales more closely related to pigs, hippos, cows or rhinos? Let’s check out the molecular evidence!
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7 DNA Analysis Compare segments of beta - casein gene
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10 DNA Differences
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11 DNA Differences
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HIPPOS are whales’ closest living relative Hippos and whales shared a common ancestor 55 million years ago
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Anatomical Evidence
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Anatomy Homologous structures: Structures that are similar because they are inherited from the same ancestor Analogous structures: Structures that have a similar function but are NOT inherited from a shared ancestor Vestigial structures: structures that are not currently helpful to an organism but were useful to an ancestor
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What is the evolutionary history of whales? Let’s check out the fossils!!
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