Many scientists believe that the demise of the dinosaurs and many other groups of organisms at the end of the Mesozoic era was due to _______.
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Q27: Rather than urea or ammonia,the nitrogenous wastes
Q43: Surviving tuataras (Sphenodon)are mostly restricted to a
Q44: The scales of reptiles are derived from
Q45: The anapsid skull is characterized by having
Q46: Turtles belong to the _.
Q47: In the reptilian egg,the embryo is bathed
Q48: Amniotes having a skull with two temporal
Q50: The tuatara belongs to the _.
Q51: The Squamata is divided into three subgroups:
Q52: The dermis layer of the reptile skin
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