Final answer:
Carbon is the nutrient that can be found in all organic compounds. It is the major element in macromolecules and accounts for 50 percent of the composition of a cell.
Step-by-step explanation:
The nutrient that can be found in all organic compounds is carbon.
Carbon is the major element in all macromolecules such as carbohydrates, proteins, nucleic acids, lipids, and many other compounds. It accounts for about 50 percent of the composition of a cell.
Other macronutrients that are needed in large amounts include nitrogen, phosphorus, and sulfur.