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Which of the following ideas proposed by Lamarck was later found to be incorrect?
Wiki User
∙ 12y ago
Lamarck thought characteristics, such as a giraffes long neck were caused by them stretching it during their lives and passing that onto their offspring - saying acquired characteristics were passed on through genetics.
What actually happens is natural selection, which means the giraffes born with long necks (by slight mutations or chance) survived better than the ones with shorter necks, as they were able to eat better, so they were able to breed and pass on the genes for long necks where the short necked giraffes died. This theory was thought of by Darwin.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoLamarck thought that evolution could be 'determanistic' - i.e directed by what the animal 'wanted' to become. Giraffes for example, would gain very tall necks by stretching them towards high trees. In reality while the outside environment constrains evolution, the processes that create differences between organisms are non-deterministic and random. Giraffes gained long necks because those with long necks survived longer and produced more offspring.
Wiki User
∙ 13y agoLamarck thought that the inheritance of acquired characteristics was the process that brought about evolutionary change. The evolution of longer and longer necks in giraffes, for example, happened because individuals' necks became longer through stretching throughout their lifetimes, and they passed on this characteristic to their offspring.
Lamarck missed the Darwinian explanation for change - the natural selection of heritable variations, variations that occur regardless of what the individual 'tries' to do.
Although the Darwinian explanation fits the evidence in most circumstances, epigenetic inheritance, which does have a flavor of 'Lamarkism', does occur. See the related link.
Wiki User
∙ 14y agoAll species were descended from other species
Wiki User
∙ 12y agoAcquired characteristics can be inherited
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