Hydroskeleton is not found in |
|||||||
a) |
Mollusca |
b) |
Echinoderms |
c) |
Annelida |
d) |
Cnidarian |
Hydroskeleton is not found in |
|||||||
a) |
Mollusca |
b) |
Echinoderms |
c) |
Annelida |
d) |
Cnidarian |
(d)
Hydroskeleton is found in and Annelids, echinoderms and other invertebrate for respiration