Which plant hormone promotes cell division?

Options

A. Auxin
B. Cytokinin
C. Gibberellin
D. Abscisic acid

Answer

**Step-by-Step Solution:**

1. **Understanding Plant Hormones**: Plant hormones are chemical substances that regulate various physiological processes in plants, including growth, development, and responses to environmental stimuli.

2. **Identifying the Hormones**: The question provides four options: auxin, cytokinin, gibberellin, and abscisic acid. Each of these hormones has distinct functions.

3. **Analyzing Each Hormone**:
- **Auxin**: Primarily promotes cell growth and elongation, and is involved in processes like fruit development without fertilization (parthenocarpy).
- **Cytokinin**: This hormone is specifically known for promoting cell division. It also plays a role in delaying the aging process (senescence) in plants.
- **Gibberellin**: Responsible for promoting stem elongation and seed germination, but not directly involved in cell division.
- **Abscisic Acid**: Known as the stress hormone, it inhibits seed germination and helps plants respond to stress, but it does not promote cell division.

4. **Conclusion**: Among the hormones listed, cytokinin is the one that promotes cell division.

**Final Answer**: Cytokinin is the plant hormone that promotes cell division.

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