Where are casparian strips in a root. Which chemical do they contain?

Explanation

### Step-by-Step Text Solution:

1. **Identify the Location of Casparian Strips**:
- Casparian strips are located in the **endodermis** of the root. The endodermis is the innermost layer of the cortex in roots.

2. **Describe the Composition of Casparian Strips**:
- The Casparian strips are primarily composed of a chemical called **suberine**. Suberine is a waxy substance that helps in the regulation of water and solute movement.

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