Mark the incorrect answer regarding the number of structure in cockroach.

Options

A. Male has three Phallomeres
B. 14-16 eggs in each ootheca
C. Each compound eye consist of 2000 ommatidia
D. 40-80 malpighian tubules

Answer

To solve the question regarding the incorrect answer about the number of structures in a cockroach, we will analyze each of the provided options step by step.

### Step 1: Analyze the first option
- **Statement**: "Cockroach has three phallomers."
- **Analysis**: This statement is correct. In male cockroaches, there are indeed three phallomers which serve as external genitalia.

**Hint**: Remember that phallomers are specific to male cockroaches and their count is a defining characteristic.

### Step 2: Analyze the second option
- **Statement**: "Each ootheca contains 14 to 16 eggs."
- **Analysis**: This statement is also correct. The ootheca (egg case) of a cockroach typically contains 14 to 16 eggs.

**Hint**: Ootheca is a key term when discussing cockroach reproduction; it’s important to know how many eggs it typically contains.

### Step 3: Analyze the third option
- **Statement**: "Each compound eye consists of 2,000 ommatidia."
- **Analysis**: This statement is correct. Each compound eye of a cockroach is made up of approximately 2,000 ommatidia, which are the individual units that contribute to vision.

**Hint**: Ommatidia are crucial for understanding how compound eyes function; knowing their number helps in understanding the eye's structure.

### Step 4: Analyze the fourth option
- **Statement**: "Cockroach has 40-80 Malpighian tubules."
- **Analysis**: This statement is incorrect. Cockroaches actually have around 150 Malpighian tubules, which are involved in excretion and osmoregulation.

**Hint**: Malpighian tubules are important for excretion in insects; knowing their typical number can help distinguish correct from incorrect statements.

### Conclusion
Based on the analysis, the incorrect statement regarding the number of structures in cockroaches is the fourth option, which states that cockroaches have 40-80 Malpighian tubules.

**Final Answer**: The incorrect answer is the fourth option: "Cockroach has 40-80 Malpighian tubules."