The modern bony fishes are the ( ).
A: lepisosteans
B: holocephalans
C: teleosts
D: holosteans
E: chondrosteans
A: lepisosteans
B: holocephalans
C: teleosts
D: holosteans
E: chondrosteans
举一反三
- Which group of fishes does not have a cartilaginous skeleton? A: sturgeon B: paddlefish C: rays D: teleosts E: skates
- The major nitrogenous waste of bony fishes is ( ). A: ammonia B: urea C: uric acid D: guanine E: creatine
- Which class contains the ray-finned fishes? A: Actinopterygii B: Sarcopterygii C: Pterobranchia D: Chondrichthyes E: Thaliacea
- The major osmoregulatory problems of saltwater fishes are ( ). A: water gain and salt loss B: water loss and salt gain C: water gain and salt gain D: water loss and salt loss E: nonexistent because freshwater fishes are isosmotic to their environment
- Which structure belongs to the bony labyrinth A: the semicircular ducts B: the utricle and saccule C: the cochlea D: cochlear duct E: Corti’s aparatus