Petromyzon and myxine belong to class |
|||||||
a) |
Gnathostomata |
b) |
Cyclostomata |
c) |
Urochordata |
d) |
Protochordata |
Petromyzon and myxine belong to class |
|||||||
a) |
Gnathostomata |
b) |
Cyclostomata |
c) |
Urochordata |
d) |
Protochordata |
(b)
Class-Cyclostomata includes round mouthed fish like lampreys (Petromyzon) and hags (Myxine)