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Which of the following features is not r...

Which of the following features is not related to the cockroach?
(a) Body divisible into head, thorax and abdomen
(b) Two pairs of wings are found
(c) Three pairs of jointed legs are present on abdomen
(d) Presence of anal cerci in both sexes.

A

Body divisible into head, thorax and abdomen

B

Two pairs of wings are found

C

Three pairs of jointed legs are present on abdomen

D

Pressence of anal cerci in both sexes.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the features related to the cockroach, we need to analyze each of the provided options carefully. 1. **Option (a)**: "Body divisible into head, thorax and abdomen" - The body of a cockroach is indeed divided into three main parts: the head, thorax, and abdomen. This is a characteristic feature of cockroaches and many other insects. Therefore, this option is related to the cockroach. 2. **Option (b)**: "Two pairs of wings are found" - Cockroaches possess two pairs of wings: the forewings (also known as tegmina) and the hindwings. This is a true statement regarding cockroaches, so this option is also related to the cockroach. 3. **Option (c)**: "Three pairs of jointed legs are present on abdomen" - This statement is incorrect. Cockroaches have three pairs of jointed legs, but they are located on the thorax, not the abdomen. The legs are attached to the thorax, which consists of the prothorax, mesothorax, and metathorax. Therefore, this option is not related to the cockroach. 4. **Option (d)**: "Presence of anal cerci in both sexes" - Cockroaches do have anal cerci, which are sensory appendages located at the rear end of their bodies. Both male and female cockroaches possess these structures. Thus, this statement is true and related to the cockroach. Based on the analysis above, the feature that is **not** related to the cockroach is: **Answer: (c) Three pairs of jointed legs are present on abdomen.** ---
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