Which of the following represents a diploid structure ?

Options

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

Answer

To determine which of the options represents a diploid structure, we need to understand the definitions of diploid and haploid.

1. **Understanding Diploid and Haploid**:
- Diploid (2n) refers to cells that contain two complete sets of chromosomes, one from each parent.
- Haploid (n) refers to cells that contain only one set of chromosomes.

2. **Analyzing the Options**:
- **Option 1: Sporophyte and Capsule of Moss**:
- The sporophyte generation in mosses is diploid. It develops from the fertilized egg and produces spores through meiosis. Therefore, this option represents a diploid structure.
- **Option 2: Gametophyte, Archegonia, and Egg of Moss**:
- The gametophyte is the dominant stage in mosses and is haploid. The archegonia (female reproductive structure) and the egg are also haploid. Hence, this option does not represent a diploid structure.
- **Option 3: Gametophyte and Sperm of Moss**:
- Similar to option 2, both the gametophyte and sperm are haploid. This option is incorrect for representing a diploid structure.
- **Option 4: Spore of White and Spore of Moss**:
- Spores are produced by the sporophyte through meiosis and are haploid. Therefore, this option does not represent a diploid structure.

3. **Conclusion**:
- The only option that represents a diploid structure is **Option 1: Sporophyte and Capsule of Moss**.

### Final Answer:
The correct answer is **Option 1: Sporophyte and Capsule of Moss**.