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15-3 Evidence of Charles Darwin

15-3 Evidence of Charles Darwin. Pg. 378. A. Inherited Variation and Artificial Selection. 1. Artificial Selection occurs when humans choose the most useful variations provided by nature. B. Evolution by Natural Selection.

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15-3 Evidence of Charles Darwin

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  1. 15-3 Evidence of Charles Darwin Pg. 378

  2. A. Inherited Variation and Artificial Selection • 1. Artificial Selection occurs when humans choose the most useful variations provided by nature.

  3. B. Evolution by Natural Selection • 1. The struggle for existence means that all organisms must compete for food, living space, and other resources.

  4. B. Evolution by Natural Selection • 2. Fitness is the ability of an individual to survive and reproduce. • ↑ Fitness = ↑ Survival

  5. B. Evolution by Natural Selection • 3. Adaptations are inherited characteristics that increase an organisms chance of survival.

  6. B. Evolution by Natural Selection • 4. Individuals with the best adaptations + fitness, have a higher chance of surviving. The process is Survival of the Fittest!

  7. B. Evolution by Natural Selection • 5. Natural selection occurs when nature causes changes in the inherited characteristics of a population.

  8. B. Evolution by Natural Selection • 6. Descent with Modification describes the changes over time that change an individuals structures and habitats.

  9. B. Evolution by Natural Selection • 7. The principle of common descent states that all species-living/extinct- came from a common ancestor.

  10. B. Evolution by Natural Selection • 8. Homologous Structures develop from similar embryonic tissues but have different mature forms.

  11. B. Evolution by Natural Selection • 9. Vestigial Organs are traces of homologous structures that serve no purpose.

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