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:Which of the following is the main reason for not…The key event in the transition of the amphibians…The transition from amphibians to mammals involves…In which of the following do fishes thrive best?The structure used by fishes to detect the presence…