Explain what has to happen to join 2 monosaccharide units into a disaccharide.

A disaccharide is produced by joining 2 monosaccharide (single sugar) units.  For example 2 glucose molecules are combined using a condensation reaction with the removal of water.

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.

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