Which of the following represents a diploid structure ?

Options

A. Sporophyte and spore of moss
B. Gametophyte, archegonia and egg of moss
C. Sporophyte and capsule of moss
D. Gametophyte, antheridia and sperm of moss

Answer

To solve the question "Which of the following represents a diploid structure?" we will analyze the structures related to mosses and identify which of them are diploid.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Diploid (2n)**: A cell or organism that has two sets of chromosomes, one from each parent. In plants, this typically refers to the sporophyte generation.
- **Haploid (n)**: A cell or organism that has one set of chromosomes. In plants, this typically refers to the gametophyte generation.

2. **Identify the Structures**:
- In mosses, there are two main generations: the **gametophyte** and the **sporophyte**.
- The **gametophyte** is the dominant phase in mosses and is haploid.
- The **sporophyte** develops from the fertilized egg and is diploid.

3. **Analyze the Options**:
- **Sporophyte**: This structure is diploid (2n).
- **Gametophyte**: This structure is haploid (n).
- **Archegonia**: This is the female reproductive structure and is haploid (n).
- **Egg**: This is also haploid (n).
- **Capsule**: The capsule is part of the sporophyte and is also diploid (2n).
- **Sporangium**: This is typically diploid as it produces haploid spores through meiosis.

4. **Conclusion**:
- The structures that are diploid in mosses are the **sporophyte** and the **capsule**. Therefore, the correct answer to the question is that the diploid structures are the **sporophyte and the capsule**.

### Final Answer:
The diploid structures in mosses are the **sporophyte** and the **capsule**.

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