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:In plants, the structure that performs a similar…The key event in the transition of the amphibians…If 25kg feed was consumed by 10,000 birds in six…In fishes, the brooders return to their parents mouth for?In which of the following do fishes thrive best?