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 statement about the number of structures in a cockroach, we will analyze each option provided in the question step by step.

### Step 1: Understand the Structure of Male Cockroach
- The first statement mentions that the male cockroach has three phalomeres. Phalomeres are the external genitalia found at the end of the abdomen in male cockroaches.
- **Conclusion**: This statement is correct.

**Hint**: Remember that phalomeres are specific to male cockroaches and are part of their reproductive anatomy.

### Step 2: Analyze the Ootheca
- The second statement claims that there are 4 to 16 eggs present in the ootheca (the egg case of cockroaches).
- It is known that the ootheca typically contains around 14 to 16 eggs.
- **Conclusion**: This statement is also correct.

**Hint**: Ootheca is a term used for the egg case in cockroaches, and the number of eggs can vary within a specific range.

### Step 3: Examine the Compound Eyes
- The third statement discusses the compound eyes of the cockroach, which are made up of ommatidia.
- Each compound eye can have around 2000 ommatidia, which are indeed the basic units of the compound eye.
- **Conclusion**: This statement is correct.

**Hint**: Ommatidia are the individual units that make up the compound eyes of insects, including cockroaches.

### Step 4: Investigate Malpighian Tubules
- The fourth statement states that there are 40 to 80 Malpighian tubules in a cockroach.
- However, it is established that cockroaches have approximately 150 Malpighian tubules, which serve as their excretory organs.
- **Conclusion**: This statement is incorrect.

**Hint**: Malpighian tubules are crucial for excretion in cockroaches, and knowing the correct number is essential for understanding their physiology.

### Final Conclusion
Based on the analysis of each statement, the incorrect answer regarding the number of structures in a cockroach is the one that states there are 40 to 80 Malpighian tubules. The correct number is approximately 150.

**Final Answer**: The incorrect statement is that there are 40 to 80 Malpighian tubules in cockroaches.