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Unformatted text preview: Unit 1 Review Chapter 1: Themes in the Study of Life ¡ Biological Hierarchy: simple to complex (atoms Æ small to large molecules Æ cells Æ multicellular organisms, etc.) ¡ Reductionism & Systems biology ¡ Know the major themes of biology and what these mean ¾ Emergent properties: new properties emerge as the levels of organization increase ¾ Metabolism: provide energy for cellular processes; heterotroph/autotroph ¾ Importance of how structure relates to function ¾ Cell ‐ basic unit of life; prokaryotic v. eukaryotic ¾ Presence of informational molecules: DNA Æ RNA Æ proteins ¾ Biological systems are regulated (feedback mechanisms) – allows organism to maintain homeostasis ¾ Populations can evolve: Darwin’s theory (descent with modification), adaptations, natural selection (mechanism of evolution) ¢ Evidence for evolution: fossils, artificial selection, presence of homologies, geology, etc. ¢ Natural selection: 4 aspects of natural selection (variation, overproduction, differential reproductive success, struggle for existence). Know what these mean.success, struggle for existence)....
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This note was uploaded on 10/16/2010 for the course HE 012928 taught by Professor Storrs,london during the Spring '10 term at École Normale Supérieure.
- Spring '10