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

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Solution

Endodermis is the layer present in the cortex and as it is made up of the suberised matrix the casparian strip which allows only selected flow of minerals inside the cell by symplast pathway to the xylem and also contains transport protein that acts as a checkpoint for the entry.
It also helps to prevent the backflow of water and mineral as it has the ability to transport mineral and ions in one direction.

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