Embryological support for evolution was proposed by

Embryological support for evolution was proposed by Ernst Heckel, based upon the observation of certain features during embryonic stage common to all vertebrates that are absent in adult.
Alfred Wallace, a naturalist who worked in Malay Archipelago had concluded that natural selection act as mechanism of evolution.
Karl Ernst von Baer disapproved the proposal given by Ernst Hackel and proposed that embryos never pass through the adult stages of other animals.
Charles Darwin proposed natural selection as mechanism of evolution.