What happens to a cell in the s phase?
the nuclear envelope develops around each set of chromosomes.
dna replicates to form two copies of chromosomes.
sister chromatids separate out from the chromosomes.

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.

To kill bacteria from our body especially from stomach