Which of the following statements is incorrect?

Options

A. Collateral glands help in the formation of ootheca
B. Gonapophysis is characteristic feature of male cockroach only
C. Malpighian tubules absorb nitrogenous waste from haemolymph and convert it into uric acid
D. Supraoesophageal ganglion supplies nerves to antennae and compound eyes

Answer

To determine which statement is incorrect regarding cockroaches, we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Statement 1: Collateral glands help in the formation of ootheca.**
- The ootheca is indeed formed by the collateral glands in female cockroaches. This statement is **correct**.

2. **Statement 2: Gonapophysis is a characteristic feature of male cockroaches only.**
- Gonapophysis is a structure found in both male and female cockroaches. Therefore, this statement is **incorrect**.

3. **Statement 3: Malpighian tubules absorb nitrogenous waste from hemolymph and convert it into uric acid.**
- Cockroaches are uricotelic organisms, meaning they excrete nitrogenous waste in the form of uric acid, which is indeed produced by the Malpighian tubules. This statement is **correct**.

4. **Statement 4: Supraesophageal ganglion supplies nerves to antennae and compound eyes.**
- The supraesophageal ganglion does supply nerves to the antennae and compound eyes, which are sensory organs. This statement is **correct**.

### Conclusion:
After analyzing all the statements, the **incorrect statement** is:
**Option 2: Gonapophysis is a characteristic feature of male cockroaches only.**