Sarah performs an experiment to determine the effect of nitrogen on plants. She studies the effect of nitrogen on the growth of the root hair, height of the plants, and nodule formation.which factor is an independent variable
The answer that is accurate is (a) Amount of Nitrogen.
The amount of nitrogen Sarah administers in this situation is an independent variable because it is not influenced by any other variables.
However, the amount of nitrogen a plant receives affects its height as well as the development of nodules and roots.
To guarantee that energy is available when and where the plant needs it to maximize output, nitrogen plays a crucial role within the plant.
Even the roots contain this essential vitamin because proteins and enzymes control water and nutrient intake.
Actually, the most crucial element for promoting plant growth is nitrogen.
The chlorophyll molecule, which gives plants their green color, contains nitrogen. Nitrogen also plays a role in the plant's ability to produce nourishment.
learn more about Nitrogen here: https://brainly.com/question/11483365
