In grasses, shape of guard cells in stomata is:
a) Dumb - bell shaped
b) Bean shaped
c) Spindle shaped
d) Pyriform shaped

Options

A. Dumb - bell shaped
B. Bean shaped
C. Spindle shaped
D. Pyriform shaped

Answer

To determine the shape of guard cells in stomata for grasses, we can follow these steps:

1. **Understand the Context**: Recognize that the question pertains to the anatomy of flowering plants, specifically the stomata in grasses, which are classified as monocots.

2. **Identify the Types of Stomata**: Stomata can have different shapes depending on the type of plant. In monocots (like grasses), the shape of guard cells is crucial for their function.

3. **Recall the Characteristics of Guard Cells**: In grasses, the guard cells are designed to efficiently regulate gas exchange and water loss. The shape of these cells affects how they function.

4. **Analyze the Options**: The options given are:
- a) Dumb-bell shaped
- b) Bean shaped
- c) Spindle shaped
- d) Pyriform shaped

5. **Match the Shape with the Plant Type**:
- **Dumb-bell shaped** guard cells are characteristic of monocots, including grasses.
- **Bean shaped** guard cells are typically found in dicots.
- **Spindle shaped** and **Pyriform shaped** are less common and not typically associated with grasses.

6. **Conclude the Answer**: Based on the characteristics of guard cells in grasses, the correct answer is **a) Dumb-bell shaped**.