Study the following statements and select the correct ones

Options

A. Auxin is transported from base to tip in large quantities
B. Cells on the dark side expand further than those on the light side
C. Apical dominace can be removed by the decapitation
D. Tropic movements in plants are under the control of gibberellins

Answer

To solve the question regarding the statements about plant growth and development, we will analyze each statement one by one and determine whether they are correct or incorrect.

### Step-by-Step Solution:

1. **Analyze Statement 1**: "Oxygen is transported from base to tip in large quantities."
- **Explanation**: This statement is incorrect. Oxygen is not a plant hormone; the correct hormone is auxin. Auxin is synthesized at the tip of the plant and moves towards the base, not the other way around. The movement of auxin is known as basipetal movement.

2. **Analyze Statement 2**: "Cells on the dark side expand further than those on the light side."
- **Explanation**: This statement is also incorrect. In phototropism, cells on the light side of a plant grow more than those on the dark side. The dark side experiences less growth due to reduced light exposure, leading to stunted growth compared to the light side.

3. **Analyze Statement 3**: "The apical dominance can be removed by decapitation."
- **Explanation**: This statement is correct. Apical dominance is controlled by auxin produced at the shoot tip. When the shoot tip is removed (decapitation), the auxin concentration decreases, allowing lateral buds to grow and thus removing apical dominance.

4. **Analyze Statement 4**: "Tropic movements in plants are under control of gibberellins."
- **Explanation**: This statement is incorrect. Tropic movements, such as phototropism and gravitropism, are primarily controlled by auxins, not gibberellins.

### Conclusion:
The only correct statement among the four provided is Statement 3: "The apical dominance can be removed by decapitation."

### Final Answer:
- **Correct Statement**: Statement 3 is correct.