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Question

About how many times does the nymph of the Periplaneta americana undergo moulting before becoming an adult?

A
4
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B
2
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C
17
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D
13
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Solution

The correct option is D 13
Immediately after hatching, the nymphs undergo 13 successive moults. As nymphal development proceeds, the wing pads, arise, body increases in size, colouration becomes darker and ultimately the adult takes its form with fully developed wings and genitalia.

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