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9/26 Lecture Notes

by: Toree Friedrich

9/26 Lecture Notes BIO 101

Marketplace > Indiana State University > Bioogy > BIO 101 > 9 26 Lecture Notes
Toree Friedrich

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About this Document

These are lecture notes form 9/26/16. This information will be on upcoming quizzes and tests
Biology 101
Steven L.Lima
Class Notes
Biology, life
25 ?




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This 2 page Class Notes was uploaded by Toree Friedrich on Monday September 26, 2016. The Class Notes belongs to BIO 101 at Indiana State University taught by Steven L.Lima in Fall 2016. Since its upload, it has received 4 views. For similar materials see Biology 101 in Bioogy at Indiana State University.


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Date Created: 09/26/16
9/26 Lecture Notes  Earliest known vascular plan – cooksonia  Carboniferous (359­397 million years ago)  Dense forests cover much of Earth  Source of coal  Crinoids dominated the ocean  Flight evolves in insects  Amphibians dominant land animals  Amniotes appear → vertebrates that do not need water for reproduction  Permian (297­251 million years ago)  Amniotes diversify and replace amphibians on land  Modern fish are dominating water  Mass extinction  96% ocean species go extinct  70% land species go extinct  CAUSE  Massive volcanic activity  Gives off much CO2  Rapid climate change   Acidification of ocean  Mesozoic Era  Biological diversity slow to recover  Triacic (251­200 million years ago)  Great radiation of diapsid reptiles begin  Dinosaurs, marine reptiles, crocodiles  Synapsid reptiles almost extinct  Flight evolves in pterosaurs  1  vertebrate  Forests are dominated by conifers  Ends in major extinction  Jurassic (200­145 million years ago)  Dinosaurs dominate land  Along with other large reptiles  Flight in a line of theropod dinosaurs → BIRDS  First flowering plants appear (angiosperms)  Mammals diversify → small and nocturnal  Cretaceous (145­65 million years ago)  Dinosaurs dominate  Birds diversify  Modern birds appear  Flowering plants spread and diversify  Mammals diversify and still small 1  Ends in mass extinction  CAUSE  Large meteor impact  Quick climate change → (colder)  Much volcanic activity  Also causing climate change  Some mammals survive  Birds are only surviving dinosaurs  Cenozoic Era  Tertiary (65­2.6 million years ago)  Mammals diversify rapidly and dominate land  Flowering plants dominate  Grass evolve and cover much of Earth  North America is repopulated from Asia  Birds and other reptiles diversify  Quarternary (2.6 million years ago – present)  Planet continues to cool  Many “ice ages” → much ice present on planet  Cause moderate extinctions  Major period of human evolution  Humans drive the extinction of nearly all large mammalst 2


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