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Q.

Which one of the following is incorrect statement about cockroach?

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a

They are pest because they destroy food and contaminate it with their smelly excreta.

b

All species have economic importance. 

c

Development in Periplanta Americana is paurometabolus type.  

d

Next to last nymphal stage has wing pads.

answer is B.

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Detailed Solution

Many species of cockroaches are wild and are of no known economic importance yet. 

A few species thrive in and around human habitat. They are pests because they spoil food and contaminate it with their smelly excreta.

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Which one of the following is incorrect statement about cockroach?