In kranz anatomy, the bundle sheath cells have

Options

A. thin walls many intercellular spaces and no chloroplasts
B. thick walls, no intercellular spaces and large number of chloroplasts
C. thin walls, no intecellular spaces and several chloroplasts
D. thick walls many intercellular spaces and few chloroplasts

Answer

**Step-by-Step Solution:**

1. **Understand Kranz Anatomy**: Kranz anatomy is a specialized structure found in C4 plants, which are adapted to dry and tropical environments. It helps these plants minimize water loss while efficiently carrying out photosynthesis.

2. **Identify the Role of Bundle Sheath Cells**: In Kranz anatomy, bundle sheath cells surround the vascular bundles. Their primary role is to protect the photosynthetic process from excessive water loss and to facilitate efficient carbon fixation.

3. **Characteristics of Bundle Sheath Cells**:
- **Thick Walls**: The bundle sheath cells have thick walls that are impervious to gaseous exchange. This characteristic helps in reducing water loss by preventing the escape of water vapor.
- **No Intercellular Spaces**: These cells lack intercellular spaces, which further minimizes the chances of water loss. The absence of spaces means that there is less area for water vapor to escape.
- **Numerous Chloroplasts**: Bundle sheath cells contain a large number of chloroplasts. This is essential for the process of photosynthesis, as these chloroplasts are responsible for converting light energy into chemical energy.

4. **Conclusion**: Based on the characteristics identified, the bundle sheath cells in Kranz anatomy have thick walls that are impervious to gaseous exchange, no intercellular spaces, and a large number of chloroplasts.

5. **Final Answer**: The correct answer is that in Kranz anatomy, the bundle sheath cells have thick walls, are impervious to gaseous exchange, lack intercellular spaces, and contain numerous chloroplasts.

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