Mesorchium in frog is an/a

Options

A. Opening of conus arteriosus
B. Peritoneal fold which adheres to the upper part of kidneys
C. Part of hind brain
D. Tissue by which ovaries are attached to the peritoneal cavity

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the nature of the mesorchium in frogs. We need to identify what mesorchium refers to from the given options.

2. **Reviewing the Options**:
- Option 1: Opening of conus arteriosus.
- Option 2: Peritoneal fold which adheres to upper part of kidney.
- Option 3: Part of hindbrain.
- Option 4: Tissue by which ovaries are attached to peritoneal cavity.

3. **Analyzing the Options**:
- **Option 1**: This option refers to a part of the heart, which is not related to mesorchium. Therefore, it is incorrect.
- **Option 2**: This option describes the mesorchium correctly as it is indeed a peritoneal fold that adheres to the upper part of the kidney in frogs.
- **Option 3**: This option refers to a part of the brain, which is unrelated to mesorchium. Thus, it is incorrect.
- **Option 4**: This option describes a tissue related to the ovaries, but mesorchium is associated with male reproductive organs. Hence, it is also incorrect.

4. **Conclusion**: Based on the analysis, the correct answer is **Option 2: Peritoneal fold which adheres to upper part of kidney**. This is because the mesorchium is a structure that supports the male reproductive organs in frogs.

---