Class Myxini and Cephalaspidomorphi
Time duration for larval stages of lamprey is:
2 months
3 months
3 years
1 month
3 years
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Tail fin with upper lobe is called:A. heterocercal tails
B. urochorda
C. chorda
D. endocotyl
Sucking mouth with teethes and rasping tongue is characteristics of class
A. myxini
B. cephalochordata
C. cephalaspidomorphi
D. Chondrichthyes
Number of pharyngeal slits in class cephalaspidomorphi is:
A. 2 pairs
B. 7 pairs
C. 5 pairs
D. 4 pairs
How many numbers of pharyngeal slits in members of class myxini?
A. 3-15 pairs
B. 2-10 pairs
C. 5-15 pairs
D. 5-20 pairs
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