Biology · PYQ NEET UG 2020

If the head of cockroach is removed, it may have live for few days because:

1. the cockroach does not have nervous system.
2. the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
3. the head holds a \( 1/3^{\text{rd}} \) of a nervous system while the rest is situated along the dorsal part of its body.
4. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.