Malpighian tubules are the excretory organs in

Options

A. Cockroach
B. Platyhelminthes
C. Ascaris
D. Pila

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks about the organism in which Malpighian tubules function as excretory organs.

2. **Identifying the Options**: The options provided are:
- Cockroach
- Platyhelminthes
- Ascaris
- Pila

3. **Analyzing Each Option**:
- **Cockroach**: Malpighian tubules are indeed the excretory organs in cockroaches. They are long, coiled tubular structures located in the abdominal cavity and they function by absorbing waste from the hemolymph (the insect equivalent of blood) and emptying into the digestive tract.

- **Platyhelminthes**: This group of organisms, which includes flatworms, has excretory organs known as flame cells, not Malpighian tubules.

- **Ascaris**: Ascaris, a type of roundworm, has excretory structures called rennet gland cells, which are different from Malpighian tubules.

- **Pila**: Pila, a type of freshwater snail, has a single large renal organ or kidney, which also does not include Malpighian tubules.

4. **Conclusion**: Based on the analysis, the correct answer is that Malpighian tubules are the excretory organs in **cockroach**.

**Final Answer**: Cockroach

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