A) Mandibles become harder
B) Anal cerci develop
C) Both fore wings and hind wings develop
D) Labium develops
Correct Answer: C
Solution :
In cockroach, development is pauro metabolous. The nymph grows by moulting about 13 times to reach the adult form. The next to last nymphal stage has wing pads but only adult cockroaches have wings. Anal cerci are a pair of jointed filamentous structures in 10th segment of both sexes. Labium is a lover lip and a pair of mandibles are present in mouthparts of cockroach.
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