Glucose, Fructose and Galactose are all monosaccharides. Their functinalities aredifferent<span> and they are structurally </span>different<span> from each other too, but the have the same molecular formula- C6H12O6. Therefore, they are Isomers of each other.</span>Disaccharides<span> are two molecules of sugar.</span>
I would say the answer to your question is C) primary succession,because p<span>rimary succession begins on rock formations, such as volcanoes or mountains, or in a place with no organisms or soil. </span>
I think the answer is d not quite sure tho