A tactile organ of Cockroach is

Options

A. Antennae
B. Ommatidia
C. Fenestrae
D. Anal cerci

Answer

To determine the tactile organ of a cockroach, we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a tactile organ of the cockroach. Tactile organs are sensory structures that help an organism sense its environment through touch.

2. **Evaluate the Options**:
- **Antennae**: These are paired appendages found on the head of the cockroach. They are known for their multifunctional sensory capabilities, including touch (tactile), smell (olfactory), and taste (gustatory).
- **Ommatidia**: These are the individual units of the compound eyes in insects. They are primarily involved in vision and not in tactile sensing.
- **Fenestrae**: This term refers to openings in the skull or bones, which are not related to tactile sensing.
- **Annulceri**: These are paired appendages found at the end of the abdomen in cockroaches, but they do not serve as tactile organs.

3. **Identify the Correct Answer**: Based on the analysis, the antennae are the correct answer as they serve as tactile organs in cockroaches, allowing them to sense their environment through touch.

4. **Conclusion**: Therefore, the tactile organ of a cockroach is the **antennae**.