Question

Select the correct statement from the ones given below with respect to Periplaneta americana (1)Malpighian tubules are present at the junction of midgut and foregut (2)Grinding of food is carried out only by the mouth parts (3)Nervous system is located dorsally and consists of segmentally arranged ganglia joined by a pair of longitudinal connectives (4)Males bear a pair of short thread-like anal styles

Answer 1

Answer:

4. males bear a pair of short thread like anal styles

Answer 2

The correct statement from the ones given below with respect to Periplaneta americana is Males bear a pair of short thread-like anal styles.

Option(4).

Explanation:

• It is the largest group of common cockroaches which are 34-53 mm long.
• The male cockroaches are longer than the female cockroaches.

• Based on the presence of a pair of anal styles in the posterior region, the male and female are easily differentiated.

• The male cockroaches have the anal styles in the ninth segment of their bodies.

• The female cockroaches don’t have those anal styles.

• A pair of sensory, 15 segmented are present in both male and female.

Learn more about Periplaneta Americana

A. Periplaneta americana is nocturnal, omnivorous, household pest.

R. It is because it acts as scavenger.

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