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Natural Selection Mr. Skirbst Natural Selection Survival & reproduction of organisms best adapted to their surroundings Natural Selection Survival & reproduction of organisms best adapted to their surroundings “Survival of the Fittest” Charles Darwin * Voyage of the Beagle – 1831 Charles Darwin * Voyage of the Beagle – 1831 * Ship’s naturalist – plant/animal study Charles Darwin * Voyage of the Beagle – 1831 * Ship’s naturalist – plant/animal study * Galapagos Islands – S. American Is. Charles Darwin * Voyage of the Beagle – 1831 * Ship’s naturalist – plant/animal study * Galapagos Islands – S. American Is. * Observed differences between island and mainland dwellers Charles Darwin * Voyage of the Beagle – 1831 * Ship’s naturalist – plant/animal study * Galapagos Islands – S. American Is. * Observed differences between island and mainland dwellers * tortoises, penguins, cormorants, iguanas, and finches Charles Darwin * tortoises, penguins, cormorants, iguanas, and finches 3 Factors of Natural Selection *only survivors pass on genes* 3 Factors of Natural Selection *only survivors pass on genes* 1. Overproduction 3 Factors of Natural Selection *only survivors pass on genes* 1. Overproduction 2. Variation 3 Factors of Natural Selection *only survivors pass on genes* 1. Overproduction 2. Variation 3. Mirrors 1. Overproduction * Reproduction > carrying capacity 1. Overproduction * Reproduction > carrying capacity * Competition for resources 1. Overproduction * Reproduction > carrying capacity * Competition for resources * Survival of the “strongest” 2. Variation * Diversity within species 2. Variation * Diversity within species * Some better suited to survive 2. Variation * Diversity within species * Some better suited to survive * Survival of the “smartest” 3. Mirrors * Diversity within species 3. Mirrors * Diversity within species * Some better suited to environment 3. Mirrors * Diversity within species * Some blend better in environment * Survival of the “sneakiest” Best Beaks Peppered Moth
