Cells of which tissue are usually dead and without protoplasts :-

Options

A. Parenchyma
B. Parenchyma
C. Sclerenchyma
D. Phloem

Answer

To answer the question "Cells of which tissue are usually dead and without protoplasts," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Tissue Types**: First, we need to identify the types of tissues mentioned in the question: parenchyma, sclerenchyma, and phloem.

2. **Characteristics of Parenchyma**: Parenchyma cells are typically living cells that contain protoplasts (the living part of the cell). They are involved in various functions such as storage, photosynthesis, and tissue repair.

3. **Characteristics of Sclerenchyma**: Sclerenchyma is a type of tissue that is characterized by having dead cells at maturity. These cells lose their protoplasts (the living contents of the cell) when they mature. They have thickened cell walls that are often lignified, providing structural support to the plant.

4. **Characteristics of Phloem**: Phloem is a type of vascular tissue responsible for the transport of nutrients, particularly sugars. The cells in phloem, such as sieve elements, are living cells and contain protoplasts.

5. **Conclusion**: Based on the characteristics of these tissues, we can conclude that the tissue with cells that are usually dead and without protoplasts is **sclerenchyma**.

### Final Answer:
The correct answer is **sclerenchyma**.

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