Xylary element absent in most of the gymnosperms

Options

A. xylem parenchyma
B. tracheids
C. vessels
D. both(2)and(3)

Answer

To solve the question regarding the absence of xylary elements in most gymnosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Xylary Elements**:
- Xylary elements refer to the components of the xylem tissue in plants. The main xylary elements include:
- Xylem parenchyma
- Xylem fibers
- Tracheids
- Vessels

2. **Identify Gymnosperms**:
- Gymnosperms are a group of seed-producing plants that do not form flowers or fruits. They include conifers, cycads, ginkgo, and gnetophytes.

3. **Analyze the Xylem Composition in Gymnosperms**:
- In gymnosperms, the xylem is primarily composed of tracheids, which are long, thin cells that help in water conduction and provide structural support.
- Unlike angiosperms (flowering plants), gymnosperms typically lack vessel elements in their xylem.

4. **Identify the Absence of Specific Elements**:
- The key xylary element that is absent in most gymnosperms is the vessel element. While xylem parenchyma and tracheids are present, vessels are not.

5. **Conclusion**:
- Therefore, the statement that xylary elements are absent in most gymnosperms refers specifically to the absence of vessel elements.

### Final Answer:
The xylary element that is absent in most gymnosperms is the vessel element.

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