Just as in humans, plants too have a number of hormones that perform different functions. Which hormone inhibits growth in plants?

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Plant Hormones**: Just like humans, plants produce hormones that regulate various functions. These hormones can either promote or inhibit growth.

2. **Identifying the Hormones**: The question provides four options: auxin, cytokinin, gibberellin, and abscisic acid. We need to analyze each hormone to determine which one inhibits growth.

3. **Analyzing Auxin**: Auxin is known for promoting cell elongation and overall growth in plants. Therefore, it does not inhibit growth.

4. **Analyzing Cytokinin**: Cytokinins are responsible for promoting cell division and delaying senescence (aging). This means they also promote growth, not inhibit it.

5. **Analyzing Gibberellin**: Gibberellins are involved in promoting growth, especially in stem elongation and seed germination. Thus, they do not inhibit growth.

6. **Analyzing Abscisic Acid**: Abscisic acid is known as the inhibitory hormone in plants. It inhibits growth, prevents seed germination, and helps plants cope with stress by closing stomata.

7. **Conclusion**: Based on the analysis, the hormone that inhibits growth in plants is **abscisic acid**.

**Final Answer**: The hormone that inhibits growth in plants is **abscisic acid**.

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