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Select the correct option with respect to cockroaches.

1. The fore wings are tegmina which are used in flight
2. Malpighian tubules convert nitrogenous wastes into urea
3. Males bear short anal styles not present in females
4. Nervous system comprises of a dorsal nerve cord and ten pairs of ganglion

Correct answer: Males bear short anal styles not present in females

Solution

Male cockroaches have short anal styles on the 9th sternum, while females lack them. The other statements are incorrect because tegmina are protective forewings, Malpighian tubules mainly excrete uric acid, and the nervous system has a ventral nerve cord.

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