Which one is the test for gibberellin ?

Options

A. Bolting in Cabbage
B. Morophogenesis in tobacco callus
C. Rapid divisions in Carrot cells
D. Elongation of Oat coleoptile.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the test that indicates the presence of gibberellin, a plant hormone involved in growth processes.

2. **Analyzing the Options**:
- **Option 1: Floating in Cabbage**: This refers to the phenomenon where the rosette habit of cabbage can be altered by gibberellin, leading to rapid elongation. This is indeed a known test for gibberellin.
- **Option 2: Morphogenesis in Tobacco Callus**: This process is primarily influenced by auxins and cytokinins, not gibberellin. Therefore, this option is incorrect.
- **Option 3: Rapid Division in Carrot Cells**: This is also influenced by cytokinins, which promote cell division. Hence, this option is incorrect as well.
- **Option 4: Elongation of Oat Coleoptile**: The elongation in oat coleoptile is primarily regulated by indole acetic acid (IAA), which is an auxin, making this option incorrect.

3. **Conclusion**: Based on the analysis, the correct test for gibberellin is the first option, "Floating in Cabbage".

**Final Answer**: The test for gibberellin is the "Floating in Cabbage".

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