Question

What is the main difference between male and female cockroach?
a. Jointed appendages
b. Paired antennae
c. Anal cerci
d. Conglobate Gland

Answer 1

Hint: Cockroach body is divided into three segments:- head, thorax, and abdomen. They have antennas that generally help them to pick up smells and vibration. After head the body have the thorax, and it has three pairs of legs and six in total with that cockroach has two pair of wings

Complete answer:
> Jointed appendages: - joined appendage help in protecting the body from loss of water and it also provides rigidity and surface for attachment in the cockroach’s body muscles. These segments are joined by a thin, soft and flexible arthrodial membrane. They have three pairs of jointed appendages and two pairs of wings.

> Paired antennae:- The paired antennae in the cockroach have been used to study the multifunctional sensory appendage that helps in generating the olfactory, gustatory, tactile, thermal is considered to play an important role in perceiving the physical objects.

> Anal cerci:- Anal cerci are present in the end of the abdomen, it is nearly the tenth segment of the body of cockroach. It is one of the important sense organs of the cockroach as they are wind sensitive and also detect vibrations. Abdomen is commonly broader in female comparatively than in female cockroaches.

> Conglobate gland: - It is the gland of male cockroach that is a reproductive organ and is present near the accessory gland. Conglobate gland helps in formation of the spermatophore.

Hence, The correct answer is option (D).

Note: It is the reproductive organ found in Male cockroach which helps in the formation of spermatophores. Jointed appendage helps in locomotion which is present in both of them. Paired antennae are the sensory organs and Anal cerci help in the sensation of wind and vibrations.