BIO120 Lecture 2

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10 Terms

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Jean-Baptiste de Lamarck

First to use the term evolution

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Lamarck’s hypothesis for the casual mechanism

The inheritance of acquired characters (Ex, Giraffes)

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Theory that disprove’s Lamarck’s understanding of evolution

August Weismann’s Germaplasm Theory (1889)

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Germaplasm Theory

Inheritance only by germ cells (gametes); somatic cells (soma/body) do not function as agents of heredity (genetic info cannot pass from soma to gametes and onto next generation)

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Modern interpretation of Germaplasm Theory

Genetic information flows in one direction only, from DNA to protein but never in reverse

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Darwin

Developed the first comprehensive theory of evolution

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Darwin & Wallace

Independently discovered the chief mechanism of evolution: Natural selection

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DW’s Theory of Evolution Thesis 1

All organisms have descended with modification from a common ancestor (thus, living things change over time)

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DW’s Theory of Evolution Thesis 2

The process leading to evolution is natural selection operating on variation among individuals

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