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GEL 113 Homework 10 Answer sheet Study Questions for Chapter 8 - Non-Dinosaurian Archosaurs Part I: True or False: 1.T 2.F 3.T 4.T 5.F Part II: Multiple Choice: 1.A 2.C 3.B 4.B 5.A 6.B 7.D Part III. Matching: A. 1.B 2.A 3.B 4.A 5.A Part IV: Thought Questions: 1. Archosauromorphs are animals which resemble archosaurs closely, but lack the anteorbital fenestra and mandibular foramen characteristic of the archosaurs.
2. "Thecodont" is not a good phylogenetic term because the thecodonts do not represent a single clade, but more likely represent at least three clades of reptiles.
3. Thecodonts where important members of the world's fauna during the Triassic Period. They gave rise to dinosaurs, pteroaurs, and possibly to ichthyosaurs.
4. An ambush predator is one which waits quietly until an unsuspecting prey animal comes too close, and then pounces on the prey animal. Modern examples of ambush predators are crocodiles and komodo dragons. 5. Pterosaur wings differ from bat wings in the arrangement of the fingers of the hand. In the pterosaur, the first three fingers are used for grasping, and the greatly elongated fourth finger supports the wing membrane. There is no fifth finger. In the bat the first finger only is free for grasping, while the remaining four fingers have the wing membrane stretched between them, forming the support for the wing.
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