Because they get all the water from the soil.
The roots
the roots
Roots.
roots
The RADICLE in a seed will become the plants roots.
Plants take in minerals through their roots.
The stem carried water up from the roots to other parts of the plants
Roots don't have roots, plants have roots.
what would happen to plants nutrition if plants did not have roots
The roots of plants are responsible for absorbing water and minerals from the soil. This process occurs through root hairs, which increase the surface area available for absorption. Water and minerals are then transported through the plant's vascular system to other parts of the plant.
Some good examples of plants that grows from roots are: Patato, Yan, Turnip, Carrot & beets. I hope this answer's your question!
Water used in photosynthesis by plants is made available by roots. That is why roots of plants are important to photosynthesis in terrestrial plants. Aqatic plants absorb water from their free surface, hence role of roots in these plants is limited.