Question

Periplaneta americana differs from Blatta orientalis in

• A. Well developed wings
• B. Absence of wings
• C. Only first pair wings developed
• D. Second pair wings developed

Answer 1

The correct option is A Well developed wings

The Periplaneta americana and Blatta orientalis are two common Indian species of cockroaches. Blatta orientalis is about 20-30 mm long and blackish in color. The female has vestigial wings while the male has short wings which do not reach the end of the body.
Periplaneta americana is the largest and about 30-50 mm long. It is differentiated from Blatta in having longer body and wings in both sexes which can fly.
Therefore, the correct answer is option A.