'Eldredge' diaporamas de présentation

Toward a Scientific History

684 views • 51 slides

Coming to Terms with the Common Core in k-12

Coming to Terms with the Common Core in k-12. Timothy Shanahan University of Illinois at Chicago www.shanahanonliteracy.com. Common Core State Standards. 46 states and DC adopted common core state standards (almost 90% of teachers and students in the U.S.)

568 views • 45 slides

Evidence Based Librarianship

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Mammalian/Primate Evolutionary History

Mammalian/Primate Evolutionary History. More Taxonomic Concepts Time Scale Early Primate Evolution (Paleocene through Oligocene) Miocene Fossils Rate of Evolutionary Change. I. Taxonomic Concepts. Structures that are shared through descent from a common ancestor are called homologies .

297 views • 13 slides

KEY CONCEPT Evolution occurs in patterns.

KEY CONCEPT Evolution occurs in patterns. Evolution through natural selection is not random. . Natural selection can have direction. The effects of natural selection add up over time. Convergent evolution describes evolution toward similar traits in unrelated species. kit fox. red fox.

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Molecular evolution What is molecular evolution? Mutation, drift and selection acting at the molecular level

Molecular evolution What is molecular evolution? Mutation, drift and selection acting at the molecular level. Change in DNA sequences. ATGGTCAAGCTTACCATG. ATG C TCAAGCTTACCATG. ATGGTCAAGCTTACCATG. ATGGTCAAG A TTACCATG. ATGGTCAAG A TTACC T TG. Molecular evolution

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Speciation Tempo of Speciation Lack of evolutionary intermediates bothers some people Traditionally interpreted as incom

Speciation Tempo of Speciation Lack of evolutionary intermediates bothers some people Traditionally interpreted as incompleteness of fossil record Two models to explain evolution Gradualism Evolution proceeds at constant rate New species evolve gradually, with distinct intermediate forms

213 views • 6 slides