Gibberellin yielding Gibberella is

Options

A. an alga
B. a fungus
C. a lichen
D. a bacterium

Answer

**Step-by-Step Solution:**

1. **Identify the Key Term**: The question asks about "Gibberellin yielding Gibberella." First, we need to clarify what Gibberellin is. Gibberellin is a plant growth regulator that promotes various growth processes in plants.

2. **Understand the Source**: Gibberellin is produced by a specific type of fungus known as Gibberella. The most notable species is Gibberella fujikuroi, which is known for producing gibberellins.

3. **Recognize the Role of Gibberella**: Gibberella fujikuroi is associated with the "foolish seedling disease" in rice. This disease is characterized by excessive elongation of the rice seedlings, which is a direct result of gibberellin production.

4. **Conclude the Answer**: Therefore, the organism that yields gibberellin is a fungus, specifically the genus Gibberella.

**Final Answer**: Gibberellin is yielded by the fungus Gibberella.

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