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What did Jean Baptiste Lamarck believe about evolution?
How did Lamarckism influence evolution?
What was Lamarck's theory of organic development?
How did organisms change their behavior according to Lamarck?
In the 1790s he began promoting the broad theories of physics, chemistry, and meteorology that he had been nurturing for almost two decades. He also began thinking about Earth’s geologic history and developed notions that he would eventually publish under the title of Hydrogéologie (1802).
Like Buffon, Lamarck believed that life had begun through spontaneous generation. But he claimed that new primitive life forms sprang up throughout the history of life; today’s microbes were simply “the new kids on the block.” Lamarck also proposed that organisms were driven from simple to increasingly more complex forms.
His classification of the mollusks was far in advance of anything proposed previously; Lamarck broke with tradition in removing the tunicates and the barnacles from the Mollusca. He also anticipated the work of Schleiden & Schwann in cell theory in stating that:
Flexi Says: In early 1800s, the French naturalist Jean-Baptiste Lamarck proposed the idea that species change over time. He argued that organisms could intentionally make changes to adapt to their environment, and pass those changes to the next generation.
Since simple organisms exist alongside complex "advanced" animals today, Lamarck thought they must be continually created by spontaneous generation. According to Lamarck, organisms altered their...
Lamarck's contribution to evolutionary theory consisted of the first truly cohesive theory of biological evolution, [9] in which an alchemical complexifying force drove organisms up a ladder of complexity, and a second environmental force adapted them to local environments through use and disuse of characteristics, differentiating them from othe...
