Natural Selection. Survival and reproduction of those organisms best adapted to their surroundings.

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Presentation transcript:

Natural Selection

Survival and reproduction of those organisms best adapted to their surroundings.

1. Variation in Traits

2. Differential Reproduction

3. Heredity

4. End Result

Types of Selection Pressures Due to environment. E.g. temperature. Due to other species. E.g. symbiosis. Due to mating. E.g. peacock plummage.

Peppered Moths and the Industrial Revolution Lichen Covered Tree Soot Covered Tree

Catterpillar Mimics Snake

Hummingbird and Flower Selection

Artificial Selection Survival and reproduction of those organisms that are selected by humans. A.k.a. breeding. Plant Breeding Animal Breeding

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