In periplaneta americana, the number of Malpighian tubules are

Options

A. `10-20`
B. `20-50`
C. `100-150`
D. `200-300`

Answer

To solve the question regarding the number of Malpighian tubules in Periplaneta americana (the American cockroach), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: The question specifies Periplaneta americana, which is the scientific name for the American cockroach.

2. **Understand the Classification**: Recognize that Periplaneta americana belongs to the phylum Arthropoda. This is important as it helps to understand the general characteristics of organisms within this group.

3. **Anatomical Structure**: The body of the cockroach is segmented and divided into three main regions: the head, thorax, and abdomen.

4. **Excretory System**: Focus on the excretory system of the cockroach. The Malpighian tubules are part of this system and are responsible for the removal of excretory products.

5. **Location of Malpighian Tubules**: The Malpighian tubules are located at the junction of the midgut and hindgut.

6. **Count the Malpighian Tubules**: It is known from biological studies that the number of Malpighian tubules in Periplaneta americana ranges from 100 to 150.

7. **Select the Correct Option**: Based on the information gathered, the correct answer to the question about the number of Malpighian tubules in Periplaneta americana is 100 to 150.

### Final Answer:
The number of Malpighian tubules in Periplaneta americana is **100 to 150**.

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