Rapid and dramatic increase in shoot length is

Options

A. Bolting
B. Triple growth response
C. Scarification
D. light break reaction.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes a rapid and dramatic increase in shoot length in plants.

2. **Analyzing the Options**:
- **Option A: Bolting**: This term refers to the rapid elongation of the shoot, especially in flowering plants, typically occurring under long-day conditions or after cold treatment. It can also be induced by gibberellic acid.
- **Option B: Triple Growth Response**: This is associated with the action of ethylene, leading to shorter, thicker shoots and increased lateral growth, which does not correspond to a rapid increase in shoot length.
- **Option C: Scarification**: This process involves altering the seed coat to promote germination, which is unrelated to shoot length.
- **Option D: Light Break Reaction**: This occurs in short-day plants during dark periods and does not relate to an increase in shoot length.

3. **Identifying the Correct Answer**: After analyzing all options, the only term that correctly describes a rapid and dramatic increase in shoot length is **Bolting**.

4. **Conclusion**: Therefore, the correct answer to the question is **Bolting**.

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