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 following represents a diploid structure, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Diploid and Haploid:**
- A diploid organism or structure has two sets of chromosomes (2n), while a haploid organism or structure has one set of chromosomes (n).

2. **Analyzing the First Option:**
- **Sporophyte and Capsule of Moss:**
- The sporophyte is the diploid generation in the plant life cycle. It develops from the fertilized egg (zygote) and produces spores through meiosis.
- The capsule of moss is part of the sporophyte and is also diploid.
- Therefore, this option represents a diploid structure.

3. **Analyzing the Second Option:**
- **Gametophyte, Archegonia, and Egg of Moss:**
- The gametophyte is the haploid generation in moss.
- Archegonia (female reproductive structure) and the egg are also haploid.
- Hence, this option is incorrect as it represents haploid structures.

4. **Analyzing the Third Option:**
- **Gametophyte, Sperm, and Egg of Moss:**
- Again, the gametophyte is haploid, and both sperm and egg are also haploid.
- This option is also incorrect as it represents haploid structures.

5. **Analyzing the Fourth Option:**
- **Sporophyte:**
- As discussed, the sporophyte is diploid.
- However, the option states only "sporophyte" without any additional context, which can be misleading.
- Since the sporophyte is diploid, this option is correct, but it lacks the context of being paired with the capsule.

6. **Conclusion:**
- The first option (Sporophyte and Capsule of Moss) is the most comprehensive and represents a diploid structure.
- Therefore, the correct answer is **Option 1**.

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