Opening of floral buds is

Options

A. autonomic movement of locomotion
B. autonomic movement of variation
C. paratonic movement of growth
D. autonomic movement of growth

Explanation

To determine the type of movement involved in the opening of floral buds, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Plant Movements**:
- Plant movements can be classified into two main categories: autonomic movements and paratonic movements.
- Autonomic movements are spontaneous and occur due to internal factors, while paratonic movements are responses to external stimuli.

2. **Identify Autonomic Movements**:
- Autonomic movements can be further divided into:
- **Tactic Movements**: Movements in response to stimuli like light or chemicals.
- **Turgor Movements**: Movements that occur due to changes in turgor pressure, such as the opening and closing of stomata.
- **Growth Movements**: Movements resulting from unequal growth on different sides of a plant organ.

3. **Focus on Growth Movements**:
- The opening of floral buds is primarily a growth movement. This occurs due to unequal growth on two sides of the floral organ, leading to the bud opening.

4. **Identify the Specific Type of Growth Movement**:
- The specific type of growth movement involved in the opening of floral buds is called **epinasty**. In this process, the upper surface of the floral organ grows more than the lower surface, causing the bud to open.

5. **Conclude the Type of Movement**:
- Based on the above analysis, the opening of floral buds is classified as an **autonomic movement of growth**, specifically an epinastic movement.

### Final Answer:
The opening of floral buds is an **autonomic movement of growth**.

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