Change is Inevitable Evidence of Evolution. Evolution Defined as:Change over time Geological Earth...
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Transcript of Change is Inevitable Evidence of Evolution. Evolution Defined as:Change over time Geological Earth...
![Page 1: Change is Inevitable Evidence of Evolution. Evolution Defined as:Change over time Geological Earth Science Biological Living things Chucky D. in 1854.](https://reader035.fdocuments.in/reader035/viewer/2022062804/5697bf871a28abf838c88d31/html5/thumbnails/1.jpg)
Change is Inevitable
Evidence of Evolution
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EvolutionDefined as: Change over time
Geological•Earth Science
Biological•Living things
Chucky D. in 1854
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Fossil EvidenceExtinct: No longer found anywhere (alive)
Extant: Living specimens
still found
Mastodon giganteus
Trichodops kerhonsonensis
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Types of fossilsMolds and casts
Dents in the mud; some get filled in
Probably T. rex Rhamphorhynchus
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Types of fossilsPetrification – literally means “turn to stone”
A mineral facsimile
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Types of fossilsAmber, Ice and Peat bogs
Contain actual material from the organisms
Oligochlora semirugosa
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Putting the fossils in order:Relative dating
Law of superposition: Oldest fossils below newer ones.
“Older/younger than”
Index fossils: Fossils of a known time of existence to compare with unknown fossilsCorrelation: Using mineral characteristics of rock layers that are no longer connected
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Radiodating: Carbon-14 breaks down at a known rate.
Putting the fossils in order:Absolute dating
How many years old
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Evidence From Living Things
Comparative anatomy: looking at the structure of different organisms for differences and similarities of form and function
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Evidence From Living Things
Comparative Embryology: Similarities/differences during development
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Evidence From Living Things
Comparative Biochemistry: Similarities/differences in chemical structures i.e. DNA, proteins, etc.,
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Comparative Anatomy
Similar internal structure and development
Different external appearance and use
Show a STRONG evolutionary relationship (recent common ancestor)
Homologous structures
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Comparative AnatomyAnalogous structuresDifferent internal structure and development
Similar external appearance and use
Show a WEAK evolutionary relationship (more distant common ancestor)
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Comparative AnatomyVestigial structuresA type of homologous structure
The “use” of the structure has changed so much it no longer has one.
Also show a STRONG evolutionary relationship (recent common ancestor)