Theory of Natural Selection

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Theory of Natural Selection
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Natural Selection
Darwins Insights
Natural Selection
Artificial Selection Thru Selective Breeding
Characteristics Are Selected Only If They Give
Offspring an Advantage
Man SelectsHeritable Traits
Environment SelectsHeritable Traits
Takes Many Generations
Takes Many Generations
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Natural Selection
Darwins Insights
All Living Organisms Produce More Offspring Than
Can Possibly Survive
Thomas MalthusNatural Resources (food, water,
living space) Limit Population Growth Through
Disease, Predation, Starvation
Darwin Realized The Same Limitations Occurred In
NatureOnly Offspring With Advantageous
AdaptationsSurvived To Reproduce
Descent with ModificationAdvantageous
Adaptations Develop Over Many Generations
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Fitness A measure of the ability to survive
andproduce more offspring relative to other
members of the population in a given environment.