| 1. | the CO2 compensation point is more |
| 2. | CO2 generated during photorespiration is trapped and recycled through PEP carboxylase |
| 3. | The CO2 efflux is not prevented |
| 4. | They have more chloroplasts |
| 1. | epidermal cells | 2. | mesophyll cells |
| 3. | bundle sheath | 4. | guard cells |
In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of:
1. mesophyll
2. bundle sheath
3. phloem
4. epidermis