Which of the following is true about the Calvin cycle? a. Rubisco fixes O2 to a carbohydrate molecule.
b. Both ATP and NADPH are needed to make sugars.
c. Light energy is converted to chemical energy.

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.