Ch15Evolution

Ch15Evolution - Theory of Evolution A. Idea supported by...

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Theory of Evolution A. Idea supported by scientific evidence (but no concrete experiments) over a long period of time B. Change in a species due to mutation of the DNA code that occurs over a long time
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Evolution of Air Breathing:
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Evolution of Brains:
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Echolocation & Prey Detection:
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Charles Darwin Natural Selection: “Survival of fit” Fit reproduce Competition for resources Best adapted species survive
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HMS Beagle Voyage 1835
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Darwin’s key ideas: A. REPRODUCTION : Organisms produce more offspring than can survive B. VARIATION :Variety in traits exist C. SURVIVAL OF THE FIT : Some traits D. Over time certain variations make up most of a population & they may be different from their ancestors
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Malthus’s contribution: Populations grow to a maximum level Environmental limitations Fit animals out compete the less fit -10% 10% 30% 50% 10 yr 20 yr 40 yr 60 yr 80 P O P U L A T I O N Carrying Capacity
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Evolution Evidence: 1. Adaptations 2. Fossils 3. Comparative anatomy 4. Comparative embryology 5. Comparative Biochemistry 6. Plate Techtonics
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1. Adaptations : feautres suited to a particular environemnt that allow organisms to survive Inuit people, who live in the extreme cold of the Arctic, have short, stout bodies that conserve heat.
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Masai people, who live in the arid lands of eastern Africa, have tall, lean bodies that disperse heat well.
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Plant Adaptations: Venus Fly Trap Captures Animals Acquires Minerals For Photo- synthesis Help!!!
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Leaf Adaptations: Succulents Thick Store Water Prevent Drying out
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Leaf Adapatations: Pine Needles Shed snow Less water loss Reduced surface area Tolerate wind
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This note was uploaded on 11/13/2011 for the course BIO 100 taught by Professor Robinson during the Winter '08 term at BYU.

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Ch15Evolution - Theory of Evolution A. Idea supported by...

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