Bio Quiz Notes

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Evolution

-Gradual change over time

>modern organisms descent from ancient organisms, and they can individualize(evolve) the new species

-Fossils-

A: Petrified Wood- minerals replace hard parts for extinct species plants/animals (ex-wood, bones)

B: Imprints- anything from footprints or leaf prints burrows into soft mud and makes hard impressions

C: Casts and Molds- casts= replica

molds= whatever surrounds

D: Freezing- intense cold prevents decay (ex- wooly mammoth, "ice man" in the alps)

E: Amber: sticky resan (sap) its a sac that protects insects (ex- insects,pollen, air bubbles)

F: Tar pit- La Brea(LA), they found the remains of a sabor tooth tiger, and wooly mammoth

-Sedimentary Rock-

>Small particles of sand, silt, clay and mud layered together, after many years it becomes cemented

> The sedimentary builds up and you have dead organisms burried in the layers (bones, teeth, nails, shells), then the sediments and dead organisms

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