The following is to be transported in flowering plants in unidirectional manner from root to shoot

Options

A. Water
B. Mineral nutrients
C. Organic substances
D. 1 and 2

Answer

To solve the question regarding what is transported in flowering plants in a unidirectional manner from root to shoot, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Transport Mechanisms in Plants**:
- In flowering plants, there are two main types of vascular tissues: xylem and phloem.
- Xylem is responsible for the transport of water and minerals from the roots to the shoots.
- Phloem, on the other hand, is responsible for the transport of organic substances and can transport in both directions.

2. **Identify the Direction of Transport**:
- The question specifically asks for substances that are transported in a unidirectional manner.
- Xylem transports water and minerals in a unidirectional flow, which means it moves these substances only from the roots upwards to the shoots.

3. **Evaluate the Options**:
- **Option A**: Water - transported in a unidirectional manner by xylem.
- **Option B**: Mineral nutrients - also transported in a unidirectional manner by xylem.
- **Option C**: Organic substances - these are transported by phloem, which allows for bidirectional transport.
- **Option D**: Both one and two - this suggests that both water and mineral nutrients are transported in a unidirectional manner.

4. **Conclusion**:
- Since both water and mineral nutrients are transported in a unidirectional manner from the roots to the shoots via xylem, the correct answer is **Option D: both one and two**.

### Final Answer:
**Option D: both one and two.**