Which is not affected by light ?

Options

A. Photosynthesis
B. Flowering
C. Fertilization
D. Transpiration

Answer

**Step-by-Step Solution:**

1. **Understanding the Processes**: We need to analyze the four options provided: photosynthesis, flowering, fertilization, and transpiration. Each of these processes plays a role in plant growth and development.

2. **Photosynthesis**: This is the process by which plants make their food using sunlight, carbon dioxide, and water. It is well-known that light is essential for photosynthesis to occur. Without light, this process cannot take place.

3. **Flowering**: Flowering in plants is influenced by light conditions. Certain plants require specific light durations (photoperiod) to trigger flowering. Therefore, flowering is also affected by light.

4. **Fertilization**: This process involves the fusion of male and female gametes to form a zygote. It occurs internally within the plant and does not require light. Thus, fertilization is not affected by light.

5. **Transpiration**: This is the process of water loss from plants through stomata. Light affects the opening and closing of stomata; during the day, stomata are generally open, allowing for greater transpiration. Hence, this process is also influenced by light.

6. **Conclusion**: After analyzing all options, we find that fertilization is the only process that is not affected by light. Therefore, the answer to the question is fertilization.

**Final Answer**: Fertilization is not affected by light.

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