Paurometabolous Development in Cockroach

Q. What are external changes visible after the last molt of a cockroach nymph?

1. Mandibles become harder
2. Anal cerci develop
3. Both fore wings and hind wings develop
4. Labium develops

Q. In the paurometabolous development of a cockroach, the nymph undergoes ____ moults to become an adult.

1. 9
2. 11
3. 13
4. 14

Q.

The next to last nymphal stage is without:

1. Wings

2. Legs

3. Wing pads

4. Compound eyes

Q. Which of the following is incorrect about Periplaneta americana?

1. Fertilized eggs are encased in ootheca
2. Food is ground by mandibles and gizzard
3. The nymph undergoes moulting almost 10 times to become an adult
4. Anterior aorta is the single large blood vessel