in order to infect cells, viruses must enter a cell and express their proteins, which can cause harm to the host cell. accroding to the model shown here, what component of the viruses enters. the host cell and directly affects the infected cell?

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.

They formed the oceans.  as they melted water was formed and the water made the oceans

Ibelieve the answer is c.