Diploid spores are produced only by

Options

A. Mosses
B. Rust causing fungi
C. Gymnosperms
D. Angiosperms

Answer

To solve the question, "Diploid spores are produced only by," we will analyze the characteristics of different organisms and their spore production.

### Step-by-Step Solution:

1. **Understanding Spores**:
- Spores are typically produced by organisms during their reproductive cycle. They can be haploid (1N) or diploid (2N).
- In most plants (kingdom Plantae), spores are haploid and arise from meiosis.

2. **Identifying Organisms**:
- The question mentions four types of organisms: moss, rust-causing fungi, gymnosperms, and angiosperms.
- We need to determine which of these can produce diploid spores.

3. **Analyzing Each Organism**:
- **Moss**: Mosses are non-vascular plants that produce haploid spores through meiosis. Therefore, they do not produce diploid spores.
- **Gymnosperms**: These are non-flowering plants that also produce haploid spores. They undergo a life cycle that includes the production of gametes from haploid spores.
- **Angiosperms**: These flowering plants also produce haploid spores. Like gymnosperms, they follow a similar reproductive cycle.
- **Rust-causing fungi**: These fungi are known for their unique reproductive strategies. Some species can produce diploid spores, which is not common among the other organisms listed.

4. **Conclusion**:
- After analyzing the spore production of each organism, we find that the only organism that produces diploid spores is the rust-causing fungi.

### Final Answer:
Diploid spores are produced only by rust-causing fungi.

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