Karl Ernst von Baer's critique of Ernst Haeckel's embryological argume…

Question

Karl Ernst von Baer's critique of Ernst Haeckel's embryological argument for evolution rested on the observation that:

Accepted Answer

A. {'text': 'Embryos never recapitulate the adult stages of other animal lineages', 'label': 'A'}

Haeckel argued that shared embryonic features (such as vestigial gill slits in vertebrate embryos) support common descent. Von Baer disagreed, noting that embryos never pass through the adult stages of other animals, so the strict recapitulation reading of embryology is unsupported.

Answer

{'text': 'Vertebrate embryos do not develop gill-slit-like structures at any stage', 'label': 'B'}

Answer

{'text': 'Embryological similarities are produced entirely by convergent evolution', 'label': 'C'}

Answer

{'text': 'Embryos of closely related species develop in completely different ways', 'label': 'D'}