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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
3
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E
13
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Solution

The correct option is C 13
Female cockroach (American Periplaneta) lays small egg capsules, called as ootheca, containing about 15 eggs. Hatched nymphs look like adult cockroaches, but they are greyish brown in colour and do not have fully developed wings. Over approx.18 months, nymphs will moult 10-13 times before becoming adults.
Therefore, the correct answer is option E.

Biology

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