All Gymnosperms are :-

Options

A. Heterosporous
B. Arborescent
C. Seed plants
D. All the above

Answer

To answer the question "All Gymnosperms are:", we will analyze the characteristics of gymnosperms based on the information provided.

### Step-by-Step Solution:

1. **Definition of Gymnosperms**:
- Gymnosperms are a group of seed-producing plants that do not form flowers or fruits. They are characterized by having seeds that are not enclosed in an ovary (unlike angiosperms).

2. **Seed Plants**:
- Gymnosperms are indeed seed plants. They were the first group of plants to evolve seeds, which provide a protective covering for the developing embryo and aid in reproduction.

3. **Heterosporous Nature**:
- Gymnosperms are heterosporous, meaning they produce two distinct types of spores: microspores (which develop into pollen grains) and megaspores (which develop into ovules). This characteristic is important for their reproductive process.

4. **Arborescent Characteristics**:
- The term "arborescent" refers to plants that have a tree-like structure. Many gymnosperms, such as pines and firs, exhibit this characteristic, growing tall and woody.

5. **Conclusion**:
- Given that gymnosperms are seed plants, heterosporous, and can be arborescent, the correct answer to the question is "all of the above."

### Final Answer:
All Gymnosperms are: **All of the above** (heterosporous, arborescent seed plants).

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