Shape of guard cells in gramineae family is :

Options

A. Kidney shaped
B. Oval
C. Round
D. Dumbel shaped

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the shape of guard cells specifically in the Gramineae family (also known as Poaceae), which includes grasses.

2. **Analyzing the Options**: The options provided are:
- Option 1: Kidney shaped
- Option 2: Oval
- Option 3: Round
- Option 4: Dumbbell shaped

3. **Evaluating Each Option**:
- **Kidney Shaped**: This shape is characteristic of guard cells found in dicotyledons (dicots). Therefore, this option is incorrect for the Gramineae family.
- **Oval**: While some guard cells may appear oval in certain plants, this is not the typical shape for guard cells in the Gramineae family. Thus, this option is also incorrect.
- **Round**: Guard cells in the Gramineae family are not typically round. Hence, this option is incorrect as well.
- **Dumbbell Shaped**: The guard cells in the Gramineae family are indeed dumbbell-shaped. They have a thick middle part and thinner ends, which is a distinctive feature of these cells.

4. **Conclusion**: After evaluating all the options, the correct answer is Option 4: Dumbbell shaped.

**Final Answer**: The shape of guard cells in the Gramineae family is dumbbell shaped.

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