In cockroach, which of the following is the principal motor centre?
Supraoesophageal ganglia
Suboesophageal ganglia
Metathoracic ganglia
Abdominal ganglia
Which accessory digestive gland found in cockroach?
In cockroach, male genital open into.....
Position of testis in Periplaneta americana
Describe digestive tract or alimentary canal of cockroach with diagram.
It is part of male cockroach