What is the primary function of a plant's root system?

• A. Anchors the plant and transports nutrients
• B. Photosynthesizes to produce energy
• C. Produces flowers
• D. Stores excess sugar

Answer: (A)

Roots primarily anchor the plant in the soil and take up water and minerals from it. This intake feeds the rest of the plant, with water and dissolved nutrients moving from root hairs into the root tissues and onward through the xylem to the stems and leaves where growth and metabolism occur. While some roots can store carbohydrates, the main job of the root system is support and nutrient transport, not energy production or reproduction. Photosynthesis happens in the leaves, and flowers form from shoots, not roots. So the best description of the root system’s main function is to hold the plant in place and supply it with water and minerals.