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BIOL 1010 (75)
Lecture 21

BIOL 1010 Lecture 21: Lecture 21
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Department
Biological Sciences
Course
BIOL 1010
Professor
Emily A.Mc Kinnon
Semester
Fall

Description
o|82 Bio 1010 UNIT 1: CHAPTERS 13, 17, 18, 19, 20 Chapter 13 – Notes Modules 13.8 - 13.10 - Evolution : In the Beginning 13.8 - Earth probably began as a molten mass The mass thens sorted into layers of varying densities, with the least dense material on the surface, solidifying into a thin crust. Earliest evidence of life on earth (fossils) is around 3.5 billion years ago Stromatolites - rocks that dominated the shore lines Prokaryotes that built them bound thin films of sediment together, migrated to the surface and started the next layer. Life arises from non living matter Many people believe that flies come from rotting meat and fish in the ocean. French scientist, Louis Pasteur in 1862, confirmed that all life arises only the the reproduction of pre-existing life. Scientists hypothesize that chemical and physical processes on early Earth could have produced very simple cells through
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