Which among these is not involved in excretion in cockroaches

Options

A. Malpighain tubules
B. Nephrocytes
C. Urecose glands
D. Maxillary plaps

Answer

To determine which among the given options is not involved in excretion in cockroaches, we can analyze each option one by one.

### Step-by-step Solution:

1. **Identify the Excretory Organs in Cockroaches:**
- The primary excretory organs in cockroaches are the **Malpighian tubules**. They are responsible for the removal of nitrogenous waste.
- **Nephrocytes** also play a role in excretion by helping in the filtration of waste products.
- **Uricose glands** are involved in the excretion process as well, aiding in the elimination of waste.

2. **Examine Each Option:**
- **Malpighian tubules**: Confirmed to be involved in excretion.
- **Nephrocytes**: Confirmed to be involved in excretion.
- **Uricose glands**: Confirmed to be involved in excretion.
- **Maxillary palps**: These are sensory organs and do not play a role in excretion.

3. **Conclusion:**
- Since Malpighian tubules, nephrocytes, and uricose glands are all involved in excretion, the only option that is not involved in the excretory process is **maxillary palps**.

### Final Answer:
The correct answer is **D) Maxillary palps**, as they are sensory organs and not involved in excretion.

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