How cytokinin works opposite to auxin?

Explanation

**Step-by-Step Solution:**

1. **Understanding Plant Hormones**: Recognize that both cytokinin and auxin are plant hormones that play crucial roles in plant growth and development.

2. **Defining Apical Dominance**: Apical dominance refers to the phenomenon where the growth of the shoot apex (the top part of the plant) is prioritized over the growth of lateral buds. This means that the main stem grows taller while the side branches remain smaller.

3. **Role of Auxin in Apical Dominance**: Auxin, particularly in high concentrations, promotes apical dominance. This means that when auxin levels are high, the shoot apex grows more vigorously, suppressing the growth of lateral buds.

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