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

Hint: The American cockroach (which is also known as the Periplaneta americana) is the largest class of common cockroach which exist in the province of India. This class is normally considered as a pest. The species of Blatta orientalis are one of the large species present on the earth. The female oriental cockroach looks similar to the Florida woods cockroach to some extent and they may be mistaken for it.

Complete answer:
As we know already the classes of the Periplaneta americana and Blatta orientalis are two common Indian species of cockroaches. We know that the color of Blatta orientalis is blackish and they are about 20-30 mm long.

The female Blatta orientalis has imperceptible wings even though the male has short wings that do not influence the end of its body.

However, the class of Periplaneta americana is the largest present in the country of India and it is about 30-50 mm long. It is distinguished from Blatta in having extensive body and wings in both sexes and they can fly.

Both classes of Periplaneta americana and Blatta orientalis have wings. In these classes, the wings are either developed or imperceptible. So they are different by the absence of development of a single pair.

Hence, the correct answer is option (A).

Note: Do you know that the Periplaneta americana is often known as a water bug, however, it is not an aquatic animal? The other names of Periplaneta americana are ship cockroach, kakerlake, and Bombay canary. Sometimes this species is indeed misidentified as a palmetto bug. Initially, the Blatta orientalis is endemic to the Crimean Peninsula and the province around the Black Sea and the Caspian Sea. However, its distribution is now diverse.