B. thick atmosphere
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C.90,000 mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Monosaccharides are simple sugar unit molecules, whereas polysaccharides are enormous, linking thousands of sugar units. Monosaccharides provide cells with short-term energy. Polysaccharides provide long-term energy storage and rigid structure to cell walls and exoskeletons of animals.
