In `C_3 and C_4` plants , the `CO_2` saturation respectively is

Options

A. At about `360 mu1L^(-1)` beyond `450mu1L^(-1)`
B. Less than `360mu1L^(-1)` , less than `450 mu1L^(-1)`
C. More than `360mu1L^(-1)` , less than `450 mu1L^(-1)`
D. Beyond `450 mu1L^(-1)` , at about `360mu1L^(-1)`

Answer

To solve the question regarding the CO2 saturation levels in C3 and C4 plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Plants**:
- C3 plants are those that utilize the Calvin cycle for photosynthesis and are typically found in cooler, wetter environments.
- C4 plants have a modified pathway that allows them to photosynthesize efficiently in hot, dry conditions.

2. **Identify CO2 Saturation Levels**:
- It is important to know the CO2 saturation levels for both types of plants to answer the question accurately.
- C3 plants generally have a CO2 saturation level around 450 micro liters per liter.
- C4 plants typically have a CO2 saturation level around 360 micro liters per liter.

3. **Review the Options Provided**:
- The options given in the question are:
- A) C3: 360 µL/L, C4: 450 µL/L
- B) C3: <360 µL/L, C4: <450 µL/L
- C) C3: >450 µL/L, C4: 360 µL/L
- D) C3: 450 µL/L, C4: 360 µL/L

4. **Match the Values with the Options**:
- From our understanding, we know that:
- C3 plants have a saturation of around 450 µL/L.
- C4 plants have a saturation of around 360 µL/L.
- Therefore, the correct option that matches these values is:
- D) C3: 450 µL/L, C4: 360 µL/L.

5. **Conclusion**:
- The correct answer to the question is option D, which states that C3 plants have a CO2 saturation of 450 µL/L and C4 plants have a saturation of 360 µL/L.