As compared to sun plats, plants adapted to low light intensity possess

Options

A. High rate of `CO_(2)` fixation
B. Larger photosynthetic unit
C. More extended root system
D. Spiny leaves.

Answer

### Step-by-Step Solution:

1. **Understanding the Environment**:
- In dense forests, tall trees receive the majority of sunlight, while the plants growing underneath (often referred to as understory plants) are adapted to lower light conditions.

2. **Leaf Structure**:
- Plants adapted to low light intensity typically have larger leaves. This adaptation allows them to capture more sunlight, which is crucial for photosynthesis, given that they are in a shaded environment.

3. **Photosynthetic Efficiency**:
- These plants often have a larger surface area for photosynthesis compared to sun plants (plants that grow in full sunlight). This increased surface area helps maximize light absorption.

4. **Stomatal Behavior**:
- In low light conditions, the stomata (tiny openings on leaves that allow gas exchange) may not be as open as in high light conditions. This can limit carbon dioxide intake, which is necessary for photosynthesis.

5. **Adaptation Mechanism**:
- To compensate for lower light and potential stomatal closure, these plants may develop a larger photosynthetic unit. This means they can utilize the available light more efficiently, enhancing their ability to produce food through photosynthesis.

6. **Conclusion**:
- Therefore, as compared to sun plants, plants adapted to low light intensity possess larger leaves and larger photosynthetic units to optimize their photosynthetic capacity.