The main elements of conduction of water and mineral salts in Pteridophytes pue Gymnosperms are

Options

A. Tracheae
B. Sieve cell
C. Tracheids
D. Sieve tube

Answer

To answer the question about the main elements of conduction of water and mineral salts in Pteridophytes and Gymnosperms, we can break down the information as follows:

### Step-by-Step Solution:

1. **Understanding the Types of Plants**:
- Pteridophytes and Gymnosperms are both vascular plants. This means they have specialized tissues for the conduction of water, minerals, and nutrients.

2. **Identifying the Conduction Tissues**:
- The primary tissues involved in the conduction of water and minerals in these plants are the xylem and phloem.
- **Xylem** is responsible for transporting water and dissolved minerals from the roots to other parts of the plant.
- **Phloem** is responsible for transporting organic nutrients, particularly sugars produced by photosynthesis, from the leaves to other parts of the plant.

3. **Focusing on Xylem**:
- In the context of water and mineral conduction, we focus primarily on the xylem.
- The xylem consists of various cell types, but the most important for water and mineral conduction are the **tracheids** and **vessels**.

4. **Identifying the Main Elements**:
- The main elements of conduction of water and minerals in Pteridophytes and Gymnosperms are **tracheids**.
- Tracheids are elongated cells in the xylem that facilitate the movement of water and minerals through the plant.

5. **Conclusion**:
- Therefore, the main elements of conduction of water and mineral salts in Pteridophytes and Gymnosperms are **tracheids**.

### Final Answer:
The main elements of conduction of water and mineral salts in Pteridophytes and Gymnosperms are **tracheids**.

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