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U1L09 Vertebrates

AP Biology B

QuestionAnswer
A chordate animal with a backbone, including sharks and rays, ray-finned fishes, coelacanths, lungfishes, amphibians, reptiles, and mammals. vertebrates
A longitudinal, flexible rod made of tightly packed mesodermal cells that runs along the anterior-posterior axis of a chordate in the dorsal part of the body. notochord
In chordate embryos, one of the slits that form from the pharyngeal clefts and communicate to the outside, later developing into gill slits in many vertebrates. pharyngeal slit
Member of the clade Urochordata, sessile marine chordates that lack a backbone. tunicate
An early, soft-bodied vertebrate with prominent eyes and dental elements. conodont
A member of an extinct group of fishlike vertebrates that had jaws and were enclosed in a tough outer armor. placoderm
Referring to a type of development in which young hatch from eggs laid outside the mother's body. oviparous
Referring to a type of development in which the young are born alive after having been nourished in the uterus by blood from the placenta. viviparous
Member of a vertebrate clade with jaws and mostly bony skeletons. osteichthyan
In aquatic osteichthyans, an air sac that enables the animal to control its buoyancy in the water. swim bladder
Member of the vertebrate clade Sarcopterygii, osteichthyans with rod-shaped muscular fins, including coelacanths, lungfishes, and tetrapods. lobe-fin
Member of the tetrapod class Amphibia, including salamanders, frogs, and caecilians. amphibian
Member of the clade of amniotes that includes tuataras, lizards, snakes, turtles, crocodilians, and birds. reptile
Referring to organisms that are warmed by heat generated by their own metabolism. This heat usually maintains a relatively stable body temperature higher than that of the external environment. endothermic
Member of an amniote clade distinguished by a pair of holes on each side of the skull. Diapsids include the lepidosaurs and archosaurs. diapsid
Member of the reptilian group that includes crocodiles, alligators and dinosaurs, including birds. archosaur
Member of an extremely diverse clade of reptiles varying in body shape, size, and habitat. Birds are the only extant dinosaurs. dinosaur
Member of the group of flightless birds. ratites
Member of an amniote clade distinguished by a single hole on each side of the skull. Synapsids include the mammals. synapsids
A mammal, such as a koala, kangaroo, or opossum, whose young complete their embryonic development inside a maternal pouch called the marsupium. marsupial
Placental mammal; mammal whose young complete their embryonic development within the uterus, joined to the mother by the placenta. eutherian
Member of a primate group made up of the monkeys and the apes (gibbons, orangutans, gorillas, chimpanzees, bonobos, and humans). anthropoid
Created by: jtaylor422
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