Populations evolve not individuals Adaptations Inherited traits that enhance survival and thus reproduction in a particular environment Charles Darwin Theory of Evolution Based on many observations. Evolution – change over time. Path to Darwin’s Theory.
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~2000 yrs old
Offspring w/in a varied population, whose characteristics best adapt them to the environment are most likely to survive and reproduce
by rate of radioactive decay
Dr. Willard Libby – Atomic physicist – Nobel Prize for C14 dating work. Before that, was a key researcher in the development of the atomic bomb.
Darwin’s and Mendel’s ideas together
Populations change genetically over time
All alleles in a population
Change in allele frequencies over time
e.g. pesticide resistant allele will increase while its alternate decreases frequencyPopulations evolve
Acting against one extreme or environment favors one extreme
e.g. darker landscape or, insects exposed to pesticides