In flowering plants, the substance that would need to be transported are :

Options

A. Water and mineral nutrients
B. Organic nutrients
C. Plant growth regulators
D. All of these

Answer

To solve the question regarding the substances that need to be transported in flowering plants, we can break it down into a series of logical steps:

### Step-by-Step Solution:

1. **Identify the Requirements of Plants**:
- Flowering plants require various substances to survive and grow. These include water, mineral nutrients, organic nutrients, and plant growth regulators.

2. **Water and Mineral Nutrients**:
- Water and mineral nutrients are essential for plants. They are absorbed by the roots from the soil. Water is crucial for photosynthesis and maintaining turgor pressure, while minerals are necessary for various physiological functions.

3. **Organic Nutrients**:
- Organic nutrients, such as carbohydrates (like glucose), proteins, and other carbon-based compounds, are produced during photosynthesis. These nutrients provide energy for growth and development and must be transported throughout the plant.

4. **Plant Growth Regulators**:
- Plant growth regulators (hormones) such as auxins, cytokinins, gibberellins, and abscisic acid play critical roles in regulating growth, development, and responses to environmental stimuli. These hormones also need to be transported within the plant.

5. **Conclusion**:
- Since all the mentioned substances (water, mineral nutrients, organic nutrients, and plant growth regulators) are essential for the plant's survival and function, the correct answer to the question is that all of these substances need to be transported.

### Final Answer:
The substances that need to be transported in flowering plants are: **All of these** (Water & Mineral Nutrients, Organic Nutrients, Plant Growth Regulators).

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