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19 terms

Biology Lab Quiz Exercise 10

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Deuterostome development
results form mesodermal out pocketing of the primitive gut, or enteron
Protostome development
results from the splitting of the mesoderm
Cell division in deuterostomes is (blank)
indeterminate
Cell division in protostomes is (blank)
determinate
Asteroidea characteristics
Sea stars, 5+ arms, ventral mouth, dorsal anus, tube feed, suckers
Ophiuroidea characteristics
Brittle stars, central disk, long flexible arms, tube feet without suckers
Echinoidea characteristics
sand dollars and sea urchins, unevenly spherical or disk-shaped, no arms, five rows of tube feet, Aristotle's lantern rings mouth
Holothuroidea characteristics
sea cucumbers, five rows of tube feet, modified tube feet as feeding tentacles, no spines, reduced skeleton
Crinoidea characteristics
sea lilies, sessile, feathered arms surrounding dorsal mouth
Why are there two invertebrate groups in phylum Chordata?
They exhibit a notochord, dorsal hollow nerve cord, pharyngeal gill slits, and a post anal tail. Intermediate characters.
Petromyzontida
lampreys, no jaw, larva resembles lancelet, cartilaginous skeleton, notochord is primary support, rudimentary vertebrae
Chondrichthyes
sharks, skates, rays, jaws present, paired fins, mineralized skeleton, placoid scales
Actinopterygii
ray-finned fish, rayed fins, operculum, cycloid scales
Actinistia
coelacanths, lobed fins
Dipnoi
lungfishes, lobed fins, lungs or lung derivatives
Amphibia
frogs, salamanders, legs
Reptiles
turtles, snakes, crocodiles, birds, amniotic egg, diapsid descent
Mammalia
mammals, milk, hair, synapsid descent
Adaptations of vertebrates to terrestrial life
cranium, vertebrae, skeleton, paired fins, muscular pharynx, jaws