Explanation:
water
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by dehydration synthesis
Cells build carbohydrate polymers by using energy to form glycosidic linkages, the bonds between monosaccharides. A dehydration synthesis reaction forms a bond between carbon atoms in two monosaccharides, sandwiching an oxygen atom between them and releasing a water molecule.
Cyanobacteria obtain their energy through photosynthesis
Mitosis splits a parent cell into two daughter cells, creating two identical cells. Meiosis is a sexual reproduction