The structure that is common in the embryos of mammals, amphibians, birds, fishes and reptiles and which is an evidence of their common ancestry is the? by Sunday | Sep 12 | Biology JAMB | 0 comments A. eye B. chorion C. allantois D. gill-silts Correct Answer: Option D – gill-silts Users Also Read These:An evidence of a common ancestral for fishes,…The transition from amphibians to mammals involves…The key event in the transition of the amphibians…In plants, the structure that performs a similar…The structure used by fishes to detect the presence…