This endodermis is critical to active transport and uptake of minerals from the soil water. Aside from mechanical anchorage, selective mineral uptake is the single most important function of the root. Design and carry out an experiment to test endodermis function. Here are some hints to get you started. The endodermis is thought to perform selective mineral uptake via active transport.
Active transport involves mineral-specific membrane transport proteins.
Eosin Y is an artificial dye, not a soil mineral. Do that test. Diagram the cross section of a root. Label your diagram by connecting lines to your drawing from the labels. Hand in all drawings with your abstract for this exercise.