Palaeontological, embryological, anatomical and molecular evidences
Evidences of evolution · Biology
Study notes
Whale flippers, bat wings, and human arms share the same bone pattern (humerus, radius-ulna, digits) — divergent evolution from one ancestor, the anatomist's proof of common descent. Meanwhile, a human embryo at 4 weeks has gill slits and a tail — von Baer's observation that embryos replay ancestry. And cytochrome c differs by 1 amino acid between humans and chimps, 10+ vs fish — molecules confirm the fossil story.