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Question

Select the correct option about cockroach :

A
Males bear short oval styles not present in females
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B
Nervous system comprises a dorsal nerve cord and ten pairs of ganglia
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C
Fore wings are tegmina which are used in flight
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D
Malpighian tubules convert nitrogenous wastes into urea
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Solution

The correct option is A Males bear short oval styles not present in females
A. Males bear short oval styles not present in females
EXPLANATION: Male and female cockroaches can be distinguished externally by the presence of anal styles. It is present in male cockroach, but not in female cockroach. The abdomen of male cockroach is slender and the last segment of the abdomen is pointed. In the 9th sternum of the abdomen of male cockroach un-jointed anal style is present.

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