Unlike other chondrichthians,the __________ have a gill cover called the operculum.
A) skates
B) rays
C) ratfish
D) elasmobranchs
E) basking sharks
Correct Answer:
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Q14: Vascular folds in the epithelium of gill
Q15: The closest living fish relative of terrestrial
Q16: The modern bony fishes are the
A)lepisosteans.
B)holocephalans.
C)teleosts.
D)holosteans.
E)chondrosteans.
Q17: Adult sea lampreys in the Great Lakes
Q18: In their feeding habits,the largest sharks are
A)herbivores.
B)filter
Q20: Vertebrates are thought to have originated at
Q21: The networks of capillaries that filter blood
Q22: The vast majority of fish are
A)viviparous.
B)ovoviviparous.
C)oviparous.
D)brooders.
E)monoecious.
Q23: Which animals are not in the infraphylum
Q24: The grouping "Osteichthyes" is considered to be
A)monophyletic.
B)paraphyletic.
C)polyphyletic.
D)triphyletic.
E)biphyletic.
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