Question:

Male cockroach and female cockroach can be differentiated by

Updated On: Jul 27, 2022
  • ocelli
  • anal cerci
  • anal styles
  • both
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The Correct Option is C

Solution and Explanation

Cockroach is dioecious i.e., the sexes are separate. Sexual dimorphism is evident in the internal reproductive organs as well as external morphology. Male cockroach and female cockroach can be differentiated by the presence of anal styles. Anal styles is present in male cockroach as a pair of short, unjointed thread like, structure on 9th sternum, in addition to anal cerci. 7th tergum 10th tergum Anal cercus Anal style 7th tergum 10th tergum Anal cercus Male (Dorsal view)Female(Dorsal view) Fig. P. americana. Posterior segments of the abdomen.
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Notes on Cockroach

Concepts Used:

Cockroach

In certain areas of the world, cockroaches are also known as waterbugs. These are one of the oldest insects whose fossils are 320 million years old. They are commonly known for ‘leaving behind stinky smells’, attacking household food items, and are considered carriers of diseases and hence are despised everywhere they are found.

Their average length is 4 cm and they are mainly reddish-brown in color. These insects have yellowish margins on the pronotum. The body of the cockroach is distinctly segmented, dorso-ventrally flattened, and covered by a shining brown exoskeleton. 

The body can be divided into three different parts such as the head, thorax, and abdomen. Wings that are darker than the body itself usually cover the dorsal body surface. By nature, cockroaches are nocturnal and omnivorous animals.

Parts of Cockroach:

Read More: Cockroach Life Cycle