Chordata: Question Preview (ID: 20053)

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Which class of fish lacks scales?
a) Agnatha b) Chondrichthyes c) Osteichthyes d)
Which structures are found only in Osteichthyes?
a) scales and gills b) lateral line and skin c) operculum and swim bladder d) caudal and dorsal fins
Which fin propels a fish in water?
a) caudal fin b) dorsal fin c) pectoral fins d) pelvic fins
Which structure in fish detects changes in the water?
a) gall bladder b) caudal peduncle c) lateral line d) swim bladder
Which structure maintains buoyancy in fish?
a) gall bladder b) lateral line c) operculum d) swim bladder
Which of the following does a freshwater fish not do?
a) Drinks water they are in b) Does not drink water they are in c) Gills absorb salt d) Produce alot of urine
Fish that live along the bottom have their
a) mouth above their eyes b) mouth even with their eyes c) mouth below their eyes d)
Which type of fin shape allows for the fastest swimming speed?
a) forked b) lunate c) paddle d) square
Which is the slowest body shape?
a) disc b) kite-like c) round d) torpedo
Which characteristic is the most helpful with fish identification?
a) body shape b) color c) mouth and eye position d) size
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