Bio ch 34 terms 8

Bio ch 34 terms 8 - ray-finned fish Member of the class...

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Placenta (pluh-sen´-tuh) A structure in the pregnant uterus for nourishing a viviparous fetus with the mother’s blood supply; formed from the uterine lining and embryonic membranes. Placoderm A member of an extinct class of fishlike vertebrates that had jaws and were enclosed in a tough outer armor. Pterosaur Winged reptile that lived during the Mesozoic era. Ratite (rat´-it) Member of the group of flightless birds.
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Unformatted text preview: ray-finned fish Member of the class Actinopterygii, aquatic osteichthyans with fins supported by long, flexible rays, including tuna, bass, and herring. Reptile Member of the clade of amniotes that includes tuataras, lizards, snakes, turtles, crocodilians, and birds. Somite One of a series of blocks of mesoderm that exist...
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