Which of the following is not a significance of photosynthesis ?

Options

A. Glucose synthesis for most of consumer
B. Increase in green house effect
C. Provides `O_(2)` for synthesis of ozone umbrella
D. Provides `O_(2)` for cell respiration.

Answer

To determine which of the following is not a significance of photosynthesis, we can analyze each option provided:

1. **Glucose synthesized for most consumers**:
- Photosynthesis is the process through which plants convert carbon dioxide and water into glucose and oxygen using sunlight. The glucose produced is essential for autotrophs (plants) and serves as a primary energy source for heterotrophs (consumers). Therefore, this statement is true and is a significance of photosynthesis.

2. **Increase in greenhouse effect**:
- The greenhouse effect is primarily caused by the accumulation of greenhouse gases like carbon dioxide in the atmosphere. Photosynthesis, on the other hand, utilizes carbon dioxide and releases oxygen. Therefore, photosynthesis does not contribute to an increase in the greenhouse effect; rather, it helps mitigate it. This statement is incorrect and is not a significance of photosynthesis.

3. **Provides oxygen for synthesis of ozone**:
- Photosynthesis releases oxygen as a by-product. This oxygen is crucial for the formation of the ozone layer in the atmosphere, which protects living organisms from harmful ultraviolet radiation. Thus, this statement is true and is a significance of photosynthesis.

4. **Provides oxygen for cellular respiration**:
- The oxygen released during photosynthesis is essential for cellular respiration in most living organisms. This process allows organisms to convert glucose into energy. Therefore, this statement is true and is a significance of photosynthesis.

Based on the analysis, the option that is not a significance of photosynthesis is:
**B. Increase in greenhouse effect.**