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Natural Selection

Natural Selection. Darwin’s Simple Observations. Darwin’s theory of natural selection was the result of noting and connecting several observations of phenomena in nature.

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Natural Selection

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  1. Natural Selection

  2. Darwin’s Simple Observations • Darwin’s theory of natural selection was the result of noting and connecting several observations of phenomena in nature. • Note: The things Darwin saw were common everyday things in nature – nothing special – in fact, you have probably noticed many of the same things yourself! • Darwin had four observations that led him to formulate his theory of evolution by natural selection.

  3. The traits for a population show variation. Most of this variation is inherited by offspring from their parents. Genetic Variation

  4. Far more offspring are produced than what can survive (due to limited resources). Populations sizes tend to remain relatively stable (Psst…”Stable” means the same.) Population Stability

  5. Darwin’s Inferences 1. The members of a species must compete for survival due to the lack of resources. YUMMY! YUMMY! YUMMY! YUMMY!

  6. Darwin’s Inferences 2. The members of the population that have the traits best suited to the environment will win the competition for limited resources. (Survival of the Fittest) WINNING!

  7. Darwin’s Inferences 3. The best fit individuals will survive and reproduce so the favourable traits will become more and more prevalent within the population over time.

  8. That’s All I Got…

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