Take a pot and fill it with soil. Take four plants from the nursery and cut the roots of two plants so that only the tender stems and some leaves remain. Now, put these four plants in the pot (two with roots and two without roots) and add water to the pot. You will observe that the two plants with cut roots dry up and die, whereas the other two plants with intact roots are healthy. This experiment proves that roots help in absorption of water and minerals from the soil.