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2 5 10 Evoluton and darwin

2 5 10 Evoluton and darwin - Georgia Tech School of Biology...

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Georgia Tech School of Biology Spring 2010 Biology 1510 Module 1: Evolution Major themes What is life? Earth history Origin of life Evolution and history of life Mechanisms of evolution Speciation
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Georgia Tech School of Biology Spring 2010 What is Life? These are the things that must/might be needed for life(he asked the class and this is what we told him) Reproduction must happen – some sort of genetic code(mutations + genetic variations) Energy metabolism Cellular : cell as the basic unit o Some sort of organic molecules(C,H,O,N) Homeostasis Growing change (programmed = development) Adaptation to environment; sense and respond to stimuli Growth curve will start exponentially and then as they reach capacity the population, As the growth curve reaches capacity, we can see competition at that stage Biology 1510
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Georgia Tech School of Biology Spring 2010 Biology 1510 Evolution happens! Evolution is the change in genetic composition of a population over time(generations) What you need: Population w/ genetic variation; some sort of phenotype Competition for limited resources
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Georgia Tech School of Biology Spring 2010 Biology 1510 Mechanism of Natural Selection Population of organisms Hereditary variations Differences in reproductive success Evolution of adaptations in the population Overproduction and struggle for existence Figure 1.20 Campbell & Reece, Fig. 1.20
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