Rod shaped elongated thick walled lignified dead cells found in seed coat of pulse legumes are

Options

A. macrosclereids
B. asteroscelereids
C. branchysclereids
D. osteosclereids

Answer

**Step-by-Step Solution:**

1. **Identify the Type of Cells**: The question describes rod-shaped, elongated, thick-walled, lignified dead cells found in the seed coat of pulse legumes. These characteristics indicate that we are dealing with a specific type of cell known as sclerids.

2. **Understand Sclerids**: Sclerids are a type of sclerenchyma tissue, which is a form of mechanical tissue in plants. This tissue is primarily responsible for providing strength and support to various parts of the plant.

3. **Focus on Macrosclerids**: Among the different types of sclerids, macrosclerids are characterized by their rod-like shape, elongated form, and thick lignified walls. They also have a narrow lumen (the hollow part of the cell).

4. **Location of Macrosclerids**: Macrosclerids are commonly found in the seed coats of leguminous plants (like pulses) as well as in other parts of the plant, such as the bark.

5. **Function of Macrosclerids**: The primary function of these cells is to provide mechanical support and protection to the plant, helping to prevent damage from external factors.

6. **Conclusion**: Based on the characteristics and functions discussed, the correct answer to the question is that the rod-shaped, elongated, thick-walled lignified dead cells found in the seed coat of pulse legumes are known as macrosclerids.

**Final Answer**: Macrosclerids.

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