Which best describes the different modes of bacterial reproduction?
a. in genetic recombination, two new genetically identical cells are produced.
b. in conjugation, a special sex pilus is required to connect two bacterial cells.
c. in transduction, a bacterium exchanges a piece of its own dna with another from the environment.
d. in transformation, bacterial dna is transferred from one bacterium to another by a replicating virus.

B is the correct answer

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.