Question

Anal style is present in ………………
A. Male cockroach
B. Female cockroach
C. Present in both sex
D. Not present in both sex

Answer 1

Hint:-The cockroach is characterized by a flattened oval body, long threadlike antennae, and a shining black or brown leathery integument. The head is bent downward, and the mouthparts point backward unlike most other insects.

Complete answer:
The main body of the cockroach can be divided into there:
Head: The head is triangular which is formed by the fusion of six segments and lies anteriorly at right angles to the longitudinal body axis
Thorax: The thorax consists of three parts, viz. prothorax, mesothorax, and metathorax.
A short extension of the prothorax called the neck connects the head with the thorax.
A pair of walking legs are present on each thoracic segment.
From mesothorax, the first pair of wings arise and the second pair arises from metathorax. Forewings are called tegmina which are opaque, dark, leathery and it covers the hind wings when at rest.
Abdomen: The abdomen consists of 10 segments. In females, the 7th segment is boat-shaped. The 7th sternum; together with the 8th and 9th sterna; forms a brood or genital part.
The female gonopore, spermathecal pores, and collateral glands are present in the anterior part of the genital part.
In males, the genital pouch lies at the hind end of the abdomen which is bound dorsally by the 9th and 10th terga and ventrally by the 9th sternum containing the dorsal anus, ventral male genital pore, and gonapophysis.
A pair of short thread-like structures called anal styles are present in males.
The 10th segment bears of pair of jointed filamentous structures called anal cerci in both sexes.
So, the correct answer is option A.

Note:-
The anal styles act as sensory organs for cockroaches. Anal styles can easily detect the environmental conditions and presence of chemicals around the environment such that cockroaches can protect themselves. This is a male copulatory structure which helps in mating.