Identify which of the given statements are correct .

Options

A. Mineral nutrients have multi-directional flow through xylem in plants .
B. Transport in xylem is from stem to roots .
C. Mineral nutrients are transported upwards from root to different parts of plant .
D. Nutrients are exported from photosynthetic leaves to all plants of plant .

Answer

To solve the question of identifying which statements are correct regarding the transport of mineral nutrients in plants, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement 1: Mineral nutrients have multidirectional flow through xylem in plants.**
- **Analysis:** This statement is correct. In plants, mineral nutrients can move in multiple directions. For instance, if minerals are produced in the leaves, they can be distributed to various parts of the plant. Similarly, minerals absorbed by the roots can also be transported to different parts of the plant. Therefore, this statement is true.

2. **Statement 2: Transport in xylem is from stems to roots.**
- **Analysis:** This statement is incorrect. The primary function of xylem is to transport water and dissolved minerals from the roots upward to the stems and leaves. This flow is unidirectional, meaning it primarily goes from the roots to the stems and leaves, not the other way around.

3. **Statement 3: Mineral nutrients are transported upward from root to different parts of the body.**
- **Analysis:** This statement is partially correct but misleading. While it is true that minerals can be transported upward from the roots, they can also be transported from the leaves and other parts of the plant. Therefore, this statement does not fully capture the multidirectional nature of nutrient transport and is considered incorrect.

4. **Statement 4: Nutrients are exported from photosynthetic leaves to all plant parts.**
- **Analysis:** This statement is also incorrect. While nutrients produced in the leaves (like sugars from photosynthesis) are indeed exported to other parts of the plant, it is not solely from the leaves. Nutrients can also be absorbed from the roots and transported to other parts. Thus, this statement does not accurately reflect the complete process of nutrient transport in plants.

### Conclusion:
After analyzing all the statements, we find that only the first statement is correct. Therefore, the correct option is:

- **Correct Statement:** Mineral nutrients have multidirectional flow through xylem in plants.