The nymph grow by mouthing about..... to reach the adult form
$13$ times
$12$ times
$10$ times
$14$ times
Explain nervous system of cockroach.
Body cavity also known as ........ in cockroach.
In cockroach, which of the following is the principal motor centre?
Match List $I$ with List $II$ related to digestive system of cockroach.
List $I$ | List $II$ |
$A$ The structures used for storing of food | $I$ Gizzard |
$B$ Ring of $6-8$ blind tubules at junction of foregut and midgut. | $II$ Gastric Caeca |
$C$ Ring of $100-150$ yellow coloured thin filaments at junction of midgut and hindgut. | $III$ Malpighian tubules |
$D$ The structures used for grinding the food. | $IV$ Crop |
Choose the correct answer from the options given below:
Cescribe the Respiratory cavities of cockroach.