NEET 2013 Biology question

What external changes are visible after the last moult of a cockroach nymph ?

(1)Mandibles become harder
(2)Anal cerci develop
(3)Both fore wings and hind wings developCorrect
(4)Labium develops

Answer: (3)

Solution

A cockroach is a paurometabolous insect; the nymph moults about 13 times and resembles the adult but lacks wings (only wing pads in the later stages). After the

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Question ID VK-091435