JAMB - Biology (2008 - No. 10)
The most important characteristic that makes reptiles to conquer terrestrial habitats is the possession of
long tail
scaly skin
sharp claw
amniotic egg
설명
It is the amniotic egg. This kind of egg is unique to the amniotes, a group that includes turtles, lizards, birds, dinosaurs, and mammals. The structure of the amniote egg is such that inside the egg are a series of fluid-filled membranes which permit the embryo to survive: the amnion, allantois, yolk sac, and chorion. Surrounding and protecting the embryo is the amnion, filled with amniotic fluid, and providing the embryo with a stable fluid environment.