What essential role does the root endodermis play during mineral absorption in plants?

Explanation

### Step-by-Step Solution:

1. **Understanding the Role of Root Endodermis**: The root endodermis is a crucial layer of cells in plant roots that plays a significant role in mineral absorption. It acts as a selective barrier that regulates the entry of minerals and ions into the plant's vascular system.

2. **Regulation of Minerals**: The primary function of the root endodermis is to control both the quantity and type of minerals that reach the xylem tissue. This regulation ensures that the plant absorbs only the necessary nutrients required for its growth and development.

3. **Transport Proteins**: The endodermis contains specific transport proteins embedded in its plasma membrane. These proteins function as checkpoints, determining which minerals and ions can be absorbed from the soil. They selectively allow certain solutes to pass while blocking others.

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