Change in colour of algae according to depth in sea is called :-

Options

A. Bohr's effect
B. Gaudikov's effect
C. Fogg's effect
D. Pasteur effect

Answer

To solve the question regarding the change in color of algae according to the depth in the sea, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Phenomenon**: The question asks about the change in color of algae based on the depth of the sea. This indicates that the color change is related to environmental factors, specifically light intensity.

2. **Identify the Options**: The options given are:
- Bore's effect
- Gordykoff's effect
- Fogg's effect
- Pasteur's effect

3. **Analyze Each Option**:
- **Bore's Effect**: This effect relates to the affinity of hemoglobin for oxygen and is not connected to algae.
- **Gordykoff's Effect**: This effect describes how the color of algae changes with varying light intensity at different depths in the sea.
- **Fogg's Effect**: This is not a recognized term in this context.
- **Pasteur's Effect**: This is related to fermentation processes and is also not relevant to algae.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **Gordykoff's effect**. This effect explains the phenomenon of color change in algae due to changes in light intensity as depth varies.

5. **Conclusion**: Therefore, the change in color of algae according to depth in the sea is called **Gordykoff's effect**.