Vascular folds in the epithelium of gill filaments are called
A) diverticulae.
B) lamellae.
C) opercula.
D) villi.
E) spiral valves.
Correct Answer:
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Q9: Which class contains the lampreys?
A)Sarcopterygii
B)Actinopterygii
C)Petromyzontida
D)Hyperotreti
E)Chondrichthyes
Q10: The lobe finned fishes,such as coelacanths,are found
Q11: In lungfishes and Indian climbing perch,_ function
Q12: Some elasmobranchs and some bony fishes such
Q13: The appearance of _ is considered to
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
Q19: Unlike other chondrichthians,the _ have a gill
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