To calculate the caloric content from the fructose in the apple, we first need to know the energy content of fructose. Fructose provides approximately 4 calories per gram.
Given that the fresh golden delicious apple contains 18.0 g of fructose, we can calculate the caloric content from fructose as follows:
\[ \text{Calories from fructose} = \text{grams of fructose} \times \text{calories per gram} \]
Substituting in the values:
\[ \text{Calories from fructose} = 18.0 , \text{g} \times 4 , \text{calories/g} = 72.0 , \text{calories} \]
Therefore, the caloric content contributed by the fructose is approximately 72.0 calories. In three significant figures, this is:
\[ \boxed{72.0} \text{ Calories} \]