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CVA Quiz

QuestionAnswer
Class Aves Birds. Feather present. Air sacs present. Endothermic. Diaphragm present. Incubation of eggs and care of young. Capable of flight unless secondarily lost.
Subclass Archaeornithes Archaeopteryx. Polyphyletic group. Sternum without keel. Bones not pneumatic. Skeletal axis of tail long. Three fingers with claws. Teeth present.
Subclass Neornithes Modern Birds. Skeletal axis of tail short. No teeth. Sternum with keel. Bones are pneumatic. No free fingers.
Class Mammalia Mammals. Mammary glands. Red blood cells without nuclei. Hair present. Endothermic. Muscular diaphragm.
Subclass Prototheria Egg-laying mammals.
Order Monotremata Monotremes: spiny anteater, duck-billed platypus. Reptile eggs. Oviparous; placenta absent. Shoulder skeleton reptilian in character. No functional teeth in adults. Cloaca present.
Deuterostomes Anus formed from embryonic blastopore. Bilateral symmetry. Radial cleavage. Complete gut. True cecum formed by endodermal outpocketing. 3 germ layers(endoderm, mesoderm, ectoderm). Internal skeleton formed from mesoderm.
Phylum Echinodermata Sea star, sea urchin, sand dollar. Unique water-vascular system. Adults with radial symmetry.
Phylum Hemichordata Tongue worms, acorn worms. Free swimming larvae similar to echinoderm larvae. Adults with proboscis, collar, and trunk. Ciliated, bilateral symmetrical larvae. Large number of pharyngeal gill slits for filter-feeding.
Phylum Chordata Notochord. Dorsal hollow nerve cord. Pharyngeal pouches and gill slits. Segmented body. Blood running posteriorly in a dorsal vessel. Ventral heart. Kidneys from mesoderm. Solid liver.
Subphylum Hemichordata
Created by: abrooker
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