Which is not true for cockroach?

Options

A. 1 pair of compound eyes
B. Forewings called tegmina used for flight are attached to 1st thoracic segment
C. 1 pair of maxilla and mandible
D. Has 10 abdominal segments

Answer

To determine which statement about the cockroach is not true, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Cockroach Anatomy:**
- The cockroach, specifically Periplaneta americana, has a complex body structure divided into three main parts: head, thorax, and abdomen.

2. **Analyzing the First Statement:**
- The first option states that the cockroach has one pair of compound eyes. This is true. Cockroaches possess a pair of compound eyes that provide them with a mosaic type of vision due to the presence of approximately 2000 ommatidia.

3. **Analyzing the Second Statement:**
- The second option claims that cockroaches have four wings called tegmina used for flight and that they are attached to the first thoracic segment. This statement is misleading. While cockroaches do have four wings, the forewings (tegmina) are not used for flight; they are protective and cover the hind wings, which are the ones actually used for flying. Additionally, the forewings are attached to the mesothoracic segment, not the first thoracic segment.

4. **Analyzing the Third Statement:**
- The third option mentions that cockroaches have one pair of maxillae and one pair of mandibles. This is correct as cockroaches possess these mouthparts for feeding.

5. **Analyzing the Fourth Statement:**
- The fourth option states that cockroaches have 10 abdominal segments. This is also true, as the abdomen of a cockroach is composed of 10 segments.

6. **Conclusion:**
- After analyzing all the statements, the only incorrect statement is the second one regarding the wings. Therefore, the answer to the question "Which is not true for cockroach?" is the second statement.

### Final Answer:
The statement that is not true for cockroach is: **"Four wings which are called as tegmina used for flight and they are attached to the first thoracic segment."**

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