1 A) nerve chord, notochord, pharyngeal slits, gills B) segmentation, lungs, postanal tail, nerve chord C) nerve chord, notochord, pharyngeal slits, postanal tail D) nerve chord, segmentation, pharyngeal slits, postanal tail E) vertebral column, notochord, pharyngeal slits, postanal tail 2 A) possession of a cellulose coat or tunic B) radial symmetry C) segmentation D) larval characteristics E) gills 3 A) The head would not form. B) Many different structures in the embryo would be affected. C) The vertebral column would be abnormal. D) The notochord would not develop. E) all of the above 4 A) their internal skeleton made of bone B) evolution of the swim bladder C) evolution of a hinged jaw D) evolution of fins for efficient swimming E) both a and c 5 A) mass extinction at the end of the Permian period B) mass extinction at the end of the Jurassic period C) competition from therapsid reptiles D) global warming E) both a and c 6 A) endothermy B) a more efficient circulatory system C) the evolution of a thicker skull D) all of the above 7 A) True B) False 8 A) a large brain, mammary glands, and hair. B) a large brain, endothermy, and hair. C) endothermy, mammary glands, and hair. D) hair, ectothermy, and mammary glands. E) binocular vision, hair, and mammary glands. 9 A) increased brain size B) bipedalism C) binocular vision D) opposable thumb E) tool use
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