Which among the following is incorrect about Echinodermata?
A. The word “Echino” means spiny and “dermata” means skinned
B. Echinoderms are dioecious with fertilization being external in most cases
C. They have a central nerve ring that extends throughout their body
D. The circulatory system is closed and they have a heart along with blood vessels
Answer:D
Which among the following is incorrect about Echinodermata?
A. The word “Echino” means spiny and “dermata” means skinned B. Echinoderms are dioecious with fertilization being external in most cases C. They have a central nerve ring that extends throughout their body D. The circulatory system is closed and they have a heart along with blood vessels