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- According to Lamarck, organisms altered their behavior in response to environmental change. Their changed behavior, in turn, modified their organs, and their offspring inherited those "improved" structures. For example, giraffes developed their elongated necks and front legs by generations of browsing on high tree leaves.
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What did Jean Baptiste Lamarck believe about evolution?
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Who was Jean-Baptiste Lamarck?
Lamarck made his most important contributions to science as a botanical and zoological systematist, as a founder of invertebrate paleontology, and as an evolutionary theorist. In his own day, his theory of evolution was generally rejected as implausible, unsubstantiated, or heretical.
Lamarck started his scientific career as a botanist, but in 1793 he became one of the founding professors of the Musee National d’Histoire Naturelle as an expert on invertebrates. His work on classifying worms, spiders, molluscs, and other boneless creatures was far ahead of his time.
Though his views were eventually eclipsed by Darwin's theory of evolution by natural selection, modern scientists have found some surprising examples of quasi-Lamarckian evolution. Credits: ©...
Apr 12, 2024 · Lamarckism, formulated by Jean-Baptiste de Monet Lamarck, is based on four fundamental postulates that form the core of his evolutionary theory: The Inner Urge of Organisms: Lamarck proposed that organisms have an innate drive to develop and grow in size.
evolution. before Charles Darwin. Lamarck's theory involved two ideas: a characteristic which is used more and more by an organism becomes bigger and stronger, and one that is not used...
The French biologist Jean-Baptiste Lamarck, among the most important of the 18th-century evolutionists, recognized the role of isolation in species formation; he also saw the unity in nature and conceived the idea of the evolutionary tree.
