Guard cells surround the stomatal pore. Dumbbell-shaped guard cells are found in

Options

A. mango
B. grass
C. bean
D. pea

Answer

**Step-by-Step Solution:**

1. **Understanding Guard Cells**: Guard cells are specialized cells that surround the stomatal pores in the leaves of plants. They play a crucial role in regulating gas exchange by controlling the opening and closing of the stomata.

2. **Types of Guard Cells**: There are two main types of guard cells based on their shape:
- Dumbbell-shaped guard cells
- Kidney-shaped guard cells

3. **Identifying the Shape and Their Locations**:
- **Dumbbell-shaped guard cells**: These are primarily found in monocot plants.
- **Kidney-shaped guard cells**: These are typically found in dicot plants.

4. **Examples of Plants**:
- **Monocots**: Examples include grasses (like wheat, rice, and corn).
- **Dicots**: Examples include beans, peas, and mango.

5. **Conclusion**: From the information provided, dumbbell-shaped guard cells are found in monocot plants. Therefore, the correct answer to the question is that dumbbell-shaped guard cells are found in grass, which is a monocot plant.

**Final Answer**: Dumbbell-shaped guard cells are found in grass (a monocot plant).

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