Examples of dead cells are

Options

A. Cork cells, sclerides, Fibers, Xylem ressels
B. Velamen cells, cork cells, collenchyma cells, xylem
C. Xylem tracheids, vessels, fibres and xylem parenchyma
D. All of the above

Answer

To answer the question "Examples of dead cells are," we can follow these steps:

### Step 1: Identify Types of Dead Cells in Plants
In plants, there are several types of cells that are classified as dead. The most notable examples include:

1. **Tracheids** - These are elongated cells found in the xylem that conduct water and minerals. They are dead at maturity and lack protoplasm.
2. **Xylem Vessels** - Similar to tracheids, these are also part of the xylem and are responsible for water transport. They are long, tubular structures that are dead at maturity.
3. **Sclerenchyma Cells** - These cells provide structural support and protection. They can be further divided into:
- **Fibers** - Long, slender cells that are dead and provide strength.
- **Sclereids (or Sclerites)** - Shorter, irregularly shaped cells that are also dead and contribute to the hardness of plant tissues.
4. **Cork Cells** - These are found in the outer layer of stems and roots, providing protection. They are dead cells filled with suberin.

### Step 2: Analyze the Options Given
When presented with options for examples of dead cells, we need to evaluate each option based on our understanding of plant histology:

- **Cork Cells**: These are dead cells, so this option is correct.
- **Sclerenchyma Cells**: These include fibers and sclereids, both of which are dead cells, so this option is also correct.
- **Xylem Vessels**: These are dead cells, so this option is correct too.
- **Parenchyma Cells**: These are living cells, so this option is incorrect.

### Step 3: Conclusion
Based on the analysis, the correct examples of dead cells include tracheids, xylem vessels, sclerenchyma cells (fibers and sclereids), and cork cells.

### Final Answer
The examples of dead cells are:
1. Tracheids
2. Xylem Vessels
3. Sclerenchyma Cells (Fibers and Sclereids)
4. Cork Cells