Final answer:
Monosaccharides vary based on the position of their carbonyl group and the number of carbons in the backbone. Aldoses have a carbonyl group at the end of the carbon chain, while ketoses have a carbonyl group in the middle.
Step-by-step explanation:
Monosaccharides are simple sugars that vary based on the position of their carbonyl group and the number of carbons in the backbone. They can be classified as aldoses or ketoses. Aldoses have a carbonyl group at the end of the carbon chain, while ketoses have a carbonyl group in the middle of the carbon chain.
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