Primitive nervous system is formed in …………. (UP-CPMT 2009)
A. sponge
B. cnidaria (coelenterate)
C. echinodermata
D. annelida
Answer:B
Primitive nervous system is formed in …………. (UP-CPMT 2009)
A. sponge B. cnidaria (coelenterate) C. echinodermata D. annelida