Which of the following is NOT a function of the root system?

The root system of a plant performs several crucial functions that support its overall health and growth, and one of these functions is not photosynthesis. Roots are primarily responsible for anchoring the plant to the soil, which provides stability. They also play a vital role in conduction, allowing for the transport of water and nutrients from the soil to the above-ground parts of the plant. Additionally, roots absorb water and minerals, which are essential for the plant's metabolic processes.

Photosynthesis, however, is a function that primarily occurs in the leaves and green parts of the plant where chlorophyll is present. This process involves converting sunlight, carbon dioxide, and water into glucose and oxygen, which is essential for the plant's energy. Since roots lack chlorophyll and do not have the capability to capture light or perform photosynthesis, this makes it the correct choice for a function that is NOT performed by the root system.