Final answer:
The simple carbohydrates include the simple sugars glucose and fructose, both of which are monosaccharides and play a key role in providing energy to living organisms.
Step-by-step explanation:
The simple carbohydrates (often called simple sugars) include the monosaccharides glucose and fructose. Glucose is a simple sugar that is used for energy by the cells of living things and is found in many plant sources, including sweeteners such as corn sugar and grape sugar. Fructose is another simple sugar, prevalent in fruits and honey, which, like glucose, is a monosaccharide and provides an important source of energy.
Both glucose and fructose are categorized as hexoses because they each contain six carbon atoms. Different in their structure, glucose has an aldehyde functional group, while fructose has a ketone functional group. The sugars glucose and fructose are crucial carbohydrates in the diet, easily absorbed by the body for immediate energy.