In the cell walls of the gurad cells cellulose microfibrils are oriented (A) _____ rather than (B)____making stomata easier to open.

Answer

To answer the question regarding the orientation of cellulose microfibrils in the cell walls of guard cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Guard Cells**: Recognize that guard cells are specialized cells that control the opening and closing of stomata, which are small pores on the leaf surface responsible for gas exchange and transpiration.

2. **Identifying Cellulose Microfibrils**: Note that guard cells have cellulose microfibrils in their cell walls. These microfibrils play a crucial role in the mechanical properties of the cell wall, influencing how the guard cells can change shape.

3. **Orientation of Microfibrils**: Understand that the orientation of these cellulose microfibrils is significant. In guard cells, the microfibrils are arranged in a specific way that facilitates their function.

4. **Comparing Orientations**: The question asks for the orientation of cellulose microfibrils in guard cells compared to other cells. In guard cells, the microfibrils are oriented radially, which means they are arranged in a circular pattern around the cell.

5. **Filling in the Blanks**:
- For (A), the correct term is "radially oriented."
- For (B), the correct term is "longitudinally oriented," which refers to the arrangement of microfibrils in other types of cells.

### Final Answer:
In the cell walls of the guard cells, cellulose microfibrils are oriented (A) **radially oriented** rather than (B) **longitudinally oriented**, making stomata easier to open.

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