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Lamarck believed that the long necks of giraffes evolved as generations of giraffes reached for ever higher leaves. Lamarck was struck by the similarities of many of the animals he studied, and was impressed too by the burgeoning fossil record. It led him to argue that life was not fixed.
Oct 7, 2015 · French naturalist Jean Baptiste Lamarck, for instance, suggested that the giraffe neck lengthened as the animals stretched to reach leaves high in trees, with a “nervous fluid” flowing into...
Jean-Baptiste Lamarck proposed that acquired characteristics were inheritable. For example, as a giraffe stretches its neck to browse higher in trees, the continuation of the habit over an extended period results in a gradual lengthening of the limbs and neck.
- The Editors of Encyclopaedia Britannica
According to Lamarck's theory, a given giraffe could, over a lifetime of straining to reach high branches, develop an elongated neck. A major downfall of his theory was that he could not explain how this might happen, though he discussed a "natural tendency toward perfection."
May 17, 2016 · The French naturalist Jean-Baptiste Lamarck held that a giraffe was merely an antelope whose progenitors had strained their necks toward higher and higher branches for food.
Aug 5, 2009 · On 14 August 1809, Jean Baptiste Lamarck presented the two volumes of his most important book, Philosophie Zoologique, to France's Institut National des Sciences et Arts. Twenty years later,...
Jean-Baptiste-Pierre-Antoine de Monet, chevalier de Lamarck. Born: August 1, 1744, Bazentin-le-Petit, Picardy, France. Died: December 18, 1829, Paris (aged 85) Notable Works: “Flore francaise”. “Histoire naturelle des animaux sans vertèbres”. “Hydrogéologie”.
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