Year: 2020
Topic: Structural Organisation in Animals
Time :
1.
If the head of cockroach is removed, it may live for few days because:
(1). the cockroach does not have nervous system.
(2). the head holdsa small proportion of a nervous system while the rest is situated along the ventral part of its body.
(3). the head holdsa /3rd 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.