A team of scientists splices a human gene into bacterial plasmids. The human gene codes for insulin. Then the scientists use the plasmids to transform bacteria. Their goal is to develop bacteria that will synthesize insulin. How is it useful for the plasmids to also contain genes for antibiotic resistance?

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.