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 eggs of birds contains relatively larger…In which of the following do fishes thrive best?The excretory product of some reptiles; birds and…In fishes, the brooders return to their parents mouth for?