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Darwin’s theory became accepted because it had more evidence that supported it. Lamarck’s theory suggest that all organisms become more complicated over time, and therefore doesn’t account for simple organisms, such as single-cell organisms. We also know through observation that characteristics inherited during an individual’s lifetime do not get passed onto their offspring; for example, if someone pierces their ear, it doesn’t mean that their children will be born with pierced ears. Darwin’s theory became even stronger when, many years after his death, the study of genetics emerged. Genetics ultimately showed that all inherited traits were passed on through genes, which are unaffected by outside world, as Lamarck would predict, and are instead naturally varied, as Darwin predicted. Though Darwin didn’t know what genes were, he could see their effect on natural selection.


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Lamarck's theory was disproved by Darwin's theory of natural selection which says only favourable genetic variations are passed on from parents to offspring. But, according to Darwin, Lamarck's idea was important because almost all organisms become complex with evolution.

What were Lamarck's and Darwin's theories?

  • According to Lamarck, all-natural variations that occur within an organism are passed on from generation to generation. The organisms become complex with time and simple organisms get disappear or extinct.
  • But, according to Darwin's theory of natural selection, the variations that are beneficial for the survival of organisms are passed on from generation to generation.
  • This natural selection leads to evolution that helps in the long survival of some selected species.
  • If the organisms are not adapted or changed to their surrounding conditions, then they extinct.
  • More complex organisms have more chances of evolution than simple organisms. This means that with evolution, organisms become complex.

Thus, Darwin disproved Lamarck's theory as all variations are not passed on. But, he still thought that Lamarck's idea was important as with evolution, organisms become complex to ensure their survival.

Learn more about Darwin's theory here:

https://brainly.com/question/12790248

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