Q. If the head of cockroach is removed, it may live for few days because :
A) the cockroach does not have nervous system.
B) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
C) the head holds a $1/3^{rd}$ of a nervous system while the rest is situated along the dorsal part of its body.
D) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
Explanation
[Solution] Only a small part of the cockroach nervous system is in the head; the rest (ventral nerve cord with ganglia) lies along the ventral side of the body. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.