Which of the following are absent in Gymnosperm ?

Options

A. Xylem vessels
B. Xylem fibres
C. Tracheids and fibres
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Gymnosperms**: Gymnosperms are a group of plants characterized by having naked seeds, meaning their seeds are not enclosed within an ovary wall. This is a key feature that distinguishes them from angiosperms (flowering plants).

2. **Identifying Xylem Components**: In plants, xylem is the tissue responsible for water conduction. It consists of several components, including:
- Xylem vessels
- Xylem fibers
- Tracheids

3. **Presence of Xylem Vessels in Gymnosperms**: Xylem vessels are specialized structures found primarily in angiosperms (flowering plants). They are absent in gymnosperms. This is a significant point because it helps to identify what is missing in gymnosperms.

4. **Presence of Other Xylem Components**: While xylem vessels are absent in gymnosperms, other components such as xylem fibers and tracheids are present. Tracheids are elongated cells that also help in water conduction and provide structural support.

5. **Conclusion**: Based on the analysis, the correct answer to the question "Which of the following are absent in Gymnosperms?" is **Xylem Vessels**.

**Final Answer**: Xylem Vessels are absent in Gymnosperms.

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