Typically , gymnosperms lack

Options

A. Xylem vessels but sieve tubes are present
B. Tracheids and sieve tubes but companion cells are present
C. Vessels , sieve tubes and companion cells
D. Tracheids and companion cells

Answer

To solve the question "Typically, gymnosperms lack," we will analyze the options provided and the characteristics of gymnosperms.

### Step-by-Step Solution:

1. **Understanding Gymnosperms**:
- Gymnosperms are a group of seed-producing plants that do not form flowers or fruits. Their seeds are often exposed or "naked," which is reflected in the name "gymnosperm" (from Greek meaning "naked seed").

2. **Identifying Key Features**:
- Gymnosperms are characterized by the absence of certain structures that are present in angiosperms (flowering plants).
- They lack flowers and fruits, which are key identifiers of angiosperms.

3. **Xylem Composition**:
- In terms of vascular tissue, gymnosperms typically lack xylem vessels. Instead, they possess tracheids, which are long, narrow cells that help in water conduction but are less efficient than vessels.

4. **Phloem Composition**:
- Gymnosperms also lack sieve tubes and companion cells, which are found in angiosperms. Instead, they have sieve cells and albuminous cells that perform similar functions to companion cells.

5. **Conclusion**:
- Based on the above points, the correct answer to the question is that gymnosperms lack vessels, sieve tubes, and companion cells.

### Final Answer:
Typically, gymnosperms lack vessels, sieve tubes, and companion cells.

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