Rate of photosynthesis is ____________than that of respiration during the day time

Options

A. higher
B. lower
C. same
D. equal

Answer

To answer the question "Rate of photosynthesis is ____________than that of respiration during the day time," we need to analyze the processes of photosynthesis and respiration in plants.

### Step-by-Step Solution:

1. **Understanding Photosynthesis**:
- Photosynthesis is the process by which green plants, using sunlight, convert carbon dioxide and water into glucose and oxygen. The general equation for photosynthesis is:
\[ 6 \text{CO}_2 + 12 \text{H}_2\text{O} \xrightarrow{\text{sunlight, chlorophyll}} \text{C}_6\text{H}_{12}\text{O}_6 + 6 \text{O}_2 + 6 \text{H}_2\text{O} \]
- This process occurs during the day when sunlight is available.

2. **Understanding Respiration**:
- Respiration is the process by which organisms, including plants, convert glucose and oxygen into energy, releasing carbon dioxide and water as byproducts. The equation for respiration is:
\[ \text{C}_6\text{H}_{12}\text{O}_6 + 6 \text{O}_2 \rightarrow 6 \text{CO}_2 + 6 \text{H}_2\text{O} + \text{energy (ATP)} \]
- This process occurs continuously, both day and night.

3. **Comparing Rates**:
- During the daytime, photosynthesis occurs at a high rate due to the availability of sunlight, while respiration also occurs but at a comparatively lower rate.
- The oxygen produced during photosynthesis exceeds the oxygen consumed during respiration, leading to an overall net gain of oxygen and glucose during the day.

4. **Conclusion**:
- Therefore, the rate of photosynthesis is higher than that of respiration during the daytime.

### Final Answer:
The correct completion of the statement is: "Rate of photosynthesis is **higher** than that of respiration during the day time."

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