From the given list, how many are unpaired structures of a cockroach ?
Tergites, Labium, Hypopharynx , Tegmina, Genital pouch, Labrum , Mandible

Options

A. Six
B. Seven
C. Five
D. Four

Answer

To determine how many unpaired structures of a cockroach are present from the given list, we will analyze each structure one by one.

### Step 1: Identify the Structures
The structures listed are:
1. Tergites
2. Labium
3. Hypopharynx
4. Tegmina
5. Genital pouch
6. Labrum
7. Mandible

### Step 2: Determine Which Structures are Found in Cockroaches
From the video transcript, we know that:
- **Tergites**: These are part of the exoskeleton but are not specifically mentioned as being unpaired.
- **Labium**: This is a paired structure (two labia).
- **Hypopharynx**: This is an unpaired structure (one hypopharynx).
- **Tegmina**: These are wings and are typically paired (two tegmina).
- **Genital pouch**: This is an unpaired structure (one genital pouch).
- **Labrum**: This is an unpaired structure (one labrum).
- **Mandible**: This is a paired structure (two mandibles).

### Step 3: Count the Unpaired Structures
From the analysis:
- Unpaired structures: Hypopharynx, Genital pouch, Labrum.
- Total unpaired structures = 3.

### Conclusion
Thus, the total number of unpaired structures of a cockroach from the given list is **3**.