__________is the largest single cell present in nature ?

Options

A. An egg of the ostrich
B. Ovum
C. Caulerpa taxifolia
D. Sperms

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the largest single cell present in nature.

2. **Consider Possible Options**: The options mentioned include the egg of an ostrich, ovum, caulapra, taxifolia, and sperms.

3. **Analyze Each Option**:
- **Ostrich Egg**: This is known to be the largest egg produced by any living bird, and before fertilization, it is considered a single cell.
- **Ovum**: This is a female gamete in humans, but it is much smaller than an ostrich egg.
- **Caulerpa taxifolia**: This is a type of green algae that is often mentioned in discussions about single-celled organisms, but it is not a single cell in the traditional sense.
- **Sperms**: These are male gametes, but again, they are much smaller than an ostrich egg.

4. **Determine the Correct Answer**: The largest single cell in nature is the egg of an ostrich. Before fertilization, the entire interior of the ostrich egg is a single cell.

5. **Final Answer**: Therefore, the answer to the question is "The egg of an ostrich."

---