Malpighian tubules in Periplaneta americana are ________in number and __________coloured.

Options

A. 50-60, green
B. 50-60, yellow
C. 100-150, green
D. 100-150, yellow

Answer

To answer the question about the Malpighian tubules in Periplaneta americana (the scientific name for a cockroach), we can break down the information as follows:

1. **Understanding Malpighian Tubules**:
- Malpighian tubules are excretory organs in insects, including cockroaches. They function similarly to kidneys in humans, helping in the excretion of waste products.

2. **Location**:
- These tubules are located at the junction of the midgut and hindgut of the cockroach.

3. **Number of Malpighian Tubules**:
- In Periplaneta americana, there are approximately 100 to 150 Malpighian tubules present.

4. **Color of Malpighian Tubules**:
- The Malpighian tubules are yellow in color and have a thread-like structure.

5. **Final Answer**:
- Therefore, the Malpighian tubules in Periplaneta americana are **100 to 150 in number and yellow in color**.