Final answer:
Jean-Baptiste Lamarck proposed one of the earliest theories of evolution and was the first to separate vertebrates from invertebrates in classification.
Step-by-step explanation:
The French naturalist Jean-Baptiste Lamarck proposed one of the earliest theories of evolution. He developed the first theory of macroevolution, which suggested how species could change over time. Lamarck was also the first to separate vertebrates from invertebrates in classification.