Lecture 8

Lecture 8 - Part 1: Introduction to Evolutionary Biology...

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Unformatted text preview: Part 1: Introduction to Evolutionary Biology Part 2: Overview of Species Diversity Introduction what evolution is Evolution within species (genes within populations, natural selection, genetic drift) Formation of new species (speciation / macroevolution) Evolution of development History of life on earth Methods we use to infer the tree of life (systematics / phylogenetics) Prokaryotes (Archaea & Bacteria) Protists Fungi Plants Overview of Animal Diversity Noncoelomates Coelomate Invertebrates Vertebrates (Fishes, Amphibians, Reptiles, Birds, Mammals) Course structure and requirements The Diversity of Life: Prokaryotes Prokaryotes Two of the three domains of life are prokaryotes Prokaryotes First cells were probably (almost certainly) prokaryotic Oldest microfossils are ~3.5 billion years old. Prokaryotes First cells were probably (almost certainly) prokaryotic Oldest microfossils are ~3.5 billion years old. Evidence of these microfossils arising from living things: Carbon isotopic evidence higher levels of C-12 than other surrounding rock Spectroscopic analysis indicating complex carbon molecules. Stromatolites sedimentary deposits trapped by mats of microorganisms. Some date to ~2.7 bya. Characteristics of Prokaryotes Unicellularity no multicellular bacteria/archaea. Some form adhesive matrices or biofilm...
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Lecture 8 - Part 1: Introduction to Evolutionary Biology...

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