Lecture 1 - Lecture 1: Introduction Evolution is a fact -...

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Lecture 1: Introduction Evolution is a fact - directly observed and tested -Sometimes said to be a theory (complex set of ideas) Does not mean it is doubted What does evolution mean? -Change-gradual or progressive -etymology- rolling out or unfolding - Biologists def- inherited change in a group or organisms through time What do we want to know about evolution? -How and why do species change in time Stickleback fish- morphology over 110000 yrs Bursts of rapid evolution -How and why does biodiversity change in time Why are mammals such a tiny slice of biodiversity? There are extinct animals that are unlike any animals alive today - Why are organisms so fit to their environment? Camoflauge Evolution in action: Hiv epidemic -Human immunodeficiency virus is the bug and AIDS is the disease it causes -extremely high levels in Africa -HIV didn’t take off until the 1980s -HIV is an RNA virus- Virus particle injects RNA---> nucleus- reverse transcribed to DNA- integrated into hosts genome -AZT-drug used to fight HIV-blocks reverse transcription by blocking the action of reverse
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This note was uploaded on 03/29/2012 for the course BIO 370 taught by Professor Edwards during the Spring '08 term at University of Texas at Austin.

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Lecture 1 - Lecture 1: Introduction Evolution is a fact -...

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