Refer the following animals and identify those which have a fluid filled body cavity with a complete lining derived from mesoderm. (i) Sycon (ii) Butterfly (iii) Nereis (iv) Sea fan (v) Scorpion (vi) Pila
A. (i) and (iii) only
B. (ii) and (iv) only
C. (ii), (iii), (v) and (vi) only
D. All of these
Correct Answer :
C. (ii), (iii), (v) and (vi) only
Butterfly, Nereis, scorpion and pila are animals which have a fluid filled body cavity with a complete lining derived from mesoderm, Hence, called as coelomate animals.