In a plant the concentration of gibberellins is highest in

Options

A. seeds and young leaves
B. apical buds
C. old leaves and flower buds
D. all the above

Answer

To answer the question "In a plant, the concentration of gibberellins is highest in," we need to analyze the options provided and understand the role of gibberellins in plant growth.

### Step-by-Step Solution:

1. **Understanding Gibberellins**:
- Gibberellins (GA) are a group of plant hormones that promote growth and influence various developmental processes, including seed germination, stem elongation, and flowering.

2. **Identifying the Options**:
- The options given are:
1. First seed and young leaves
2. Apical bud
3. Old leaves and flower bud
4. All of the above

3. **Analyzing Each Option**:
- **Option 1: First seed and young leaves**:
- Gibberellins are known to be concentrated in seeds and young leaves as they are crucial for promoting growth and germination.
- **Option 2: Apical bud**:
- The apical bud primarily contains auxins, which are responsible for apical dominance, not gibberellins.
- **Option 3: Old leaves and flower bud**:
- Gibberellins are not concentrated in old leaves and flower buds; these areas are more associated with other hormones.
- **Option 4: All of the above**:
- Since not all options are correct, this cannot be the right answer.

4. **Conclusion**:
- Based on the analysis, the highest concentration of gibberellins is found in **first seed and young leaves**. Therefore, the correct answer is **Option 1**.

### Final Answer:
The concentration of gibberellins is highest in **first seed and young leaves**.

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