Lecture 1 themes in 42852

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Unformatted text preview: • The biological world and all of its inherent features are the products of >3 billion years of change; change that: – – – – has resulted in a multitude of adaptations is present at the molecular level through to the organismal level relies on the genetic variation possessed by all populations of species is preserved and passed on to future generations hemoglobin myoglobin The Dawn of Homer Monkious eatalotis Chimpus imbecilus Apes stupidus Neanderslob Homersapien • The process of understanding biology begins with curiosity & inquiry – answers come from a methodical approach of scientific observa‐ tion & experimentation. • Understanding the enormity of biology begins by developing a view of life based on a few “big ideas” or themes that permeate all areas of biology: • Emergent properties • Cells – basic unit of life • Exchange of Matter & Energy • DNA – molecule of life • Form Fits Function • Biological systems are regulated • The big one Evolution • In BIOL 1361 we will be exploring the features and properties of life often from a reductionist viewpoint. – Reductionism: examine the “parts” that make up the complex form in order to understand how it functions. – As the “parts” are put back together, new features emerge that the individual components themselves do not possess. [emergent properties] • The reductionist approach reveals the scope of biology as it is organized into different levels: – Largest (biosphere, i.e., Earth) to smallest (atoms) – The dividing line between life & non‐life: the level of the cell – emergent properties; depends upon arrangements & interaction of components at each level. Levels of Biological Organization The biosphere Ecosystem: (All living + non‐ living components in a specific area) Forest Communities (all living species in a specific area) Populations (all members of a species in an area) Maple trees Organisms (individuals) Single maple tree Levels of Bio...
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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.

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