Just as muscles become strengthened by work, more strongly exercised organs attract and become enlarged by the “nervous fluid.” 

Acquired during an individual’s lifetime, are inherited—a principle called inheritance of acquired characteristics.

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#Id: 7026

#XL - T Zoology

Evolution means descent with modification, or change in the form, physiology, and behavior of organisms over many generations of time. 

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#Id: 7027

#XL - T Zoology

Proximate causes - The subject of cell biology, neurobiology, and many other biological disciplines

Ultimate causes - Their historical causes, especially the action of natural selection

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#Id: 7028

#XL - T Zoology

 Before Darwin - Christians interpreted “special creation”

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#Id: 7029

#XL - T Zoology

Carolus Linnaeus - Classified “related” species into genera, “related” genera into orders, and so on. 

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#Id: 7030

#XL - T Zoology

James Hutton and Charles Lyell – Uniformitarianism Darwin was greatly influenced by Lyell’s teachings, and he adopted uniformitarianism in his thinking about evolution.

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#Id: 7031

#XL - T Zoology

Chevalier de Lamarck - Inheritance of acquired characteristics