Hen's egg is a ___________

Options

A. tissue
B. organ
C. organ system
D. cell

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks us to identify what a hen's egg is classified as among the options: tissue, organ, organ system, or cell.

2. **Identifying the Nature of a Hen's Egg**: A hen's egg is the reproductive structure produced by female chickens. It contains all the necessary components for developing into a chick.

3. **Analyzing the Options**:
- **Tissue**: This is a group of cells that work together to perform a specific function. A hen's egg is not just a collection of cells.
- **Organ**: An organ is made up of different types of tissues that work together. While a hen's egg is complex, it is not classified as an organ.
- **Organ System**: This is a group of organs that work together to perform complex functions. A hen's egg does not fit this definition.
- **Cell**: A hen's egg is considered a single cell, specifically a large yolk cell (ovum) that contains the genetic material and nutrients necessary for the development of a chick.

4. **Conclusion**: Based on the analysis, the correct classification for a hen's egg is that it is a **cell**.

5. **Final Answer**: Hen's egg is a **cell**.

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