In female cockroach, how many ovarian tubules or ovarioles are present ?
(a) 3
(b) 6
(c) 8
(d) 16

Options

A. 3
B. 6
C. 8
D. 16

Answer

To determine the number of ovarian tubules (or ovarioles) present in a female cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Reproductive System of Female Cockroach**:
- The female cockroach has a well-developed reproductive system.

2. **Identify the Structure of the Ovaries**:
- The reproductive system consists of two large ovaries.

3. **Locate the Ovaries**:
- These ovaries are located in the sixth abdominal segment of the cockroach.

4. **Count the Ovarian Tubules**:
- Each ovary is made up of a group of 8 ovarian tubules.

5. **Calculate the Total Number of Ovarioles**:
- Since there are 2 ovaries and each ovary contains 8 ovarioles, the total number of ovarioles is:
\[ 2 \text{ ovaries} \times 8 \text{ ovarioles/ovary} = 16 \text{ ovarioles} \]

6. **Select the Correct Option**:
- Therefore, the correct answer is (d) 16.

### Final Answer:
The number of ovarian tubules or ovarioles present in a female cockroach is **16**.

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