A scientist called Lamarck proposed a mechanism for evolution. The passage gives Lamarck’s explanation of the evolution of the long legs of wading birds.
‘Change occurs because an animal passes on to its offspring changes it acquires during its lifetime. The long legs of wading birds arose when those animals’ ancestors responded to a need to feed on fish. In their attempt to get into deeper water, but still keep their bodies dry, they would stretch their legs to the full extent, making them slightly longer in the process. This trait would be passed on to the next generation, who would in turn stretch their legs. Over many generations the wading birds’ legs became much longer.’
Darwin’s proposal of natural selection would give a different explanation for the evolution of the long legs of wading birds. Describe the differences between Lamarck’s and Darwin’s explanations of the evolution of the long legs of wading birds.