Cryptogams do not have

Options

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

Answer

To solve the question "Cryptogams do not have," we need to analyze the characteristics of cryptogams and the options provided.

### Step-by-Step Solution:

1. **Understand Cryptogams**:
- Cryptogams are non-flowering plants that reproduce via spores. They do not produce seeds or flowers. This group includes algae, fungi, mosses, and ferns.

2. **Identify Key Features**:
- Cryptogams lack certain structures that are typically found in higher plants, especially those involved in the vascular system (like xylem and phloem).

3. **Analyze the Options**:
- **Option 1**: Xylem vessels and sieve tubes
- Cryptogams do have xylem (in the form of tracheids) and sieve tubes (in some cases). Therefore, this option is incorrect.
- **Option 2**: Tracheids and sieve tubes
- Cryptogams possess tracheids for water conduction and may have sieve tubes. So, this option is also incorrect.
- **Option 3**: Vessels, sieve tubes, and companion cells
- Cryptogams do not have xylem vessels (which are specialized for water transport in higher plants), sieve tubes, or companion cells (which are involved in the transport of nutrients). Therefore, this option is correct.
- **Option 4**: Tracheids and companion cells
- Cryptogams do have tracheids, but they do not have companion cells. This option is incorrect.

4. **Conclusion**:
- The correct answer is **Option 3: Vessels, sieve tubes, and companion cells**, as cryptogams do not possess these structures.

### Final Answer:
Cryptogams do not have vessels, sieve tubes, and companion cells.

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