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Lamarcks theory was accepted during Darwin's life, stated that an orgnisims use or disuse of an organ lead to its refinment. That parents could pass on traits acquired during its life to its offspring.

Darwin stated that changes in offspring were random and could not be modified by the parents actions.

Evolution was still the same, changes accumulating over time, but how those changes came about, through the organisim its self, lamark, or randomly Darwin.

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12y ago
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12y ago

Lamarck believed that evolution happened when parents passed on learned traits to offspring. For example, he believed giraffes developed long necks after generations of stretching their heads up to reach the tops of trees. Darwin proposed that organisms evolved through gradual change in their DNA caused by survival of the fittest. For example, giraffes might have long necks, because all giraffes with short necks died without reproducing because they couldn't reach enough food to survive.

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Q: How were lamarck's beliefs different from Darwin's?
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