An advancement that reptiles show over amphibians is
A) a tough,scaly skin that provides protection against desiccation.
B) a copulatory organ for internal fertilization.
C) a shelled egg that can be laid on dry land.
D) all of these
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Q29: The _ are the "lizard hipped" dinosaurs.
A)ornithischians
B)saurischians
C)archosaurs
D)hadrosaurs
Q30: The tuatara
A)is found in the southern part
Q31: Many lizards keep their body temperatures relatively
Q32: The dinosaurs may be considered to be
Q33: Snakes and lizards utilize their _ in
Q35: Only crocodilians and mammals have
A)a four-chambered heart.
B)a
Q36: In the shelled eggs of reptiles
A)the amnion
Q37: The Crocodilia
A)have internal fertilization.
B)are the only reptiles
Q38: If a bit of reptilian skin was
Q39: Lizards possess _,which is absent in snakes,but
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