Lamarcks theory stated that accquried charatricstics can be passed on to the next generation. People found this difficult to believe. For example, if two parents were to built up there muscles in the gym, Lamarcks theory said that this characteristic would be passed on to the offsprng.
Darwins theory stated that small changes took place over time. All organisms vary and therefore some are more likely to survive (natural selection.) Those that are best adapted breed and pass along charatristics.
It took a long time for Darwins theory to be accepted. Many people wanted to believe that God was resposible for the creation of a new species.
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