Evidence for Evolution. A slide extravaganza…. Types of evidence…. 1. Evidence from the fossil record (dead things). Fossil formation. Bones and shells undergo mineral replacement and are turned into rock
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A slide extravaganza…
The Archaeopterix -- between reptile and bird
Homo - logy
Homologous structures have the same underlying forms
And compared to our arm…
Ana - logy
Analogous structures have a similar outward appearance (but different underlying forms)
A common ancestor gives rise to organisms that evolve for different environmentsTypes of evolution
Vestige - a left-over/ remnant
Vestigial structures are evolutionary “leftovers” from an earlier ancestor
(Look at that “hand” too!)
…can you guess which one is human?
…how about now?
Were you right?
DNA similarity between species is used to determine how closely related they are.
This is in turn used to construct possible evolutionary trees.
Mystery critter! (I’m not telling)
…got your guess?
This tree was constructed by looking at % similarity of DNA among “bears”
…so why is he called a red panda?
Hawaiian Rock Wallabies!