Describe the role of casparian strips in roots.

Explanation

### Step-by-Step Solution:

1. **Understanding the Structure**:
- Casparian strips are specialized structures found in the endodermis of plant roots. They are composed of suberin, a waxy substance that is hydrophobic.

2. **Pathways of Water Movement**:
- Water can move through the root via two main pathways: the apoplast pathway and the symplast pathway.
- The **apoplast pathway** involves the movement of water through the cell walls and intercellular spaces without entering the cells.
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