In leaves, xylem and phloem are present

Options

A. On different radii and arrangement is called radial
B. On different radii and arrangement is called conjoint
C. At the same radius and arrangement is called radial
D. At the same radius and arrangement is called conjoint

Answer

To answer the question regarding the presence and arrangement of xylem and phloem in leaves, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Xylem and Phloem**:
- Xylem is responsible for transporting water and minerals from the roots to the rest of the plant.
- Phloem is responsible for transporting food (sugars) produced during photosynthesis from the leaves to other parts of the plant.

2. **Arrangement in Leaves**:
- In most leaves, both xylem and phloem are found together in the vascular bundles.
- These vascular bundles can be arranged in two main ways:
- **Conjoint**: where xylem and phloem are located on the same radius.
- **Radial**: where xylem and phloem are located on different radii.

3. **Analyzing the Options**:
- **Option 1**: "On different radii and arrangement is called radial."
- This is incorrect because this describes the radial arrangement, not the arrangement in leaves.
- **Option 2**: "On different radii and the arrangement is called conjoined."
- This is incorrect because conjoined refers to xylem and phloem being on the same radius.
- **Option 3**: "At the same radius and arrangement is called radial."
- This is incorrect because if they are at the same radius, it is called conjoined, not radial.
- **Option 4**: "At the same radius and the arrangement is called conjoint."
- This is correct because xylem and phloem are indeed found at the same radius in leaves, and this arrangement is referred to as conjoined.

4. **Conclusion**:
- The correct answer is **Option 4**: "At the same radius and the arrangement is called conjoint."