The size of vascualr bundles in a dorsiventral leaf is dependent on

Options

A. Size of lamina
B. Size of veins
C. Number of stomata
D. Number of veins

Answer

To solve the question regarding the dependency of the size of vascular bundles in a dorsiventral leaf, let's break it down step by step:

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**: Vascular bundles are composed of xylem and phloem, which are responsible for the transport of water, nutrients, and food in plants. In leaves, these bundles are crucial for maintaining the leaf's physiological functions.

2. **Identifying the Leaf Type**: The question specifies a "dorsiventral leaf." Dorsiventral leaves, such as those found in dicots, have a distinct upper (adaxial) and lower (abaxial) surface. This structure influences the arrangement and size of vascular bundles.

3. **Analyzing the Options**: The options provided are:
- Size of lamina
- Size of veins
- Number of stomata
- Number of veins

4. **Evaluating Each Option**:
- **Size of Lamina**: This refers to the overall area of the leaf blade. While it may influence overall leaf structure, it does not directly determine the size of vascular bundles.
- **Size of Veins**: This is crucial. The size of the vascular bundles is directly related to the thickness of the veins, which can vary significantly in different parts of the leaf.
- **Number of Stomata**: Stomata are involved in gas exchange but do not influence the size of vascular bundles.
- **Number of Veins**: While the number of veins can affect the leaf's overall structure, it does not directly determine the size of individual vascular bundles.

5. **Conclusion**: The size of vascular bundles in a dorsiventral leaf is primarily dependent on the **size of veins**. In dicots, the veins exhibit reticulate venation, leading to variations in the thickness of the vascular bundles.

### Final Answer:
The size of vascular bundles in a dorsiventral leaf is dependent on the **size of veins**.