When temperature is increased from minimum to optimum, rate of photosynthesis doubles for every ____ rise in temperature.

Options

A. (a) `1^(@)C`
B. (b) `10^(@)C`
C. (c) `20^(@)C`
D. (d) `30^(@)C`

Explanation

To solve the question regarding the rate of photosynthesis in relation to temperature changes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Relationship Between Temperature and Photosynthesis:**
- Photosynthesis is influenced by various environmental factors, including temperature. As temperature increases, the rate of photosynthesis typically increases as well.

2. **Identify the Minimum and Optimum Temperatures:**
- The minimum temperature required for photosynthesis varies among plants, generally ranging from 0 to 5 degrees Celsius for most plants. Some exceptional plants can start photosynthesis at even lower temperatures.
- The optimum temperature for photosynthesis is around 27 to 28 degrees Celsius for most plants.

3. **Determine the Maximum Temperature for Photosynthesis:**
- The rate of photosynthesis continues to increase with temperature up to about 40 degrees Celsius. Beyond this point, the rate of photosynthesis begins to decline due to enzyme inactivation and potential damage to chloroplasts.

4. **Calculate the Rate of Photosynthesis Doubling:**
- The question specifically asks how much the temperature needs to rise for the rate of photosynthesis to double. According to the information provided, the rate of photosynthesis doubles for every 10 degrees Celsius increase in temperature.

5. **Select the Correct Answer:**
- Based on the information gathered, the correct answer to the question is that the rate of photosynthesis doubles for every **10 degrees Celsius** rise in temperature.

### Final Answer:
The rate of photosynthesis doubles for every **10 degrees Celsius** rise in temperature.

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