Lamarck believed that organisms could inherit characteristics that they acquired during their lifetime, whereas Darwin believed in the principle of natural selection, which holds that organisms that are better adapted to their environment are more likely to survive and reproduce.
Lamarck believed that all organisms have a tendency to strive for perfection, while Darwin believed that organisms are only capable of adapting to their environment to the extent that their traits allow them to.
Lamarck believed that use and disuse of organs could lead to their growth or atrophy, while Darwin believed that traits that confer a survival advantage are more likely to be passed on to future generations.
Lamarck believed that acquired characteristics could be passed on to offspring, while Darwin believed that only traits that are heritable can be passed on to offspring.
Lamarck believed that the environment could directly cause changes in an organism, whereas Darwin believed that changes in the environment can lead to the survival of organisms with certain advantageous traits.
