Which of the following is not part of the biosphere:

a: viruses

b: rocks

c: algae

d: mammals

b: rocks

Explanation:

The biosphere is one of the several spheres that make the complex system of Earth. This sphere is the one that is consisted of all the living organisms on the planet. The animals, plants, viruses, algae, bacteria, all make up this system, and so far at least, it seems that the biosphere is something unique to Earth.

The biosphere is in constant interaction with the other spheres, and it is dependent on them, as they are dependent on it. The influences of the biosphere on the other spheres can be easily seen in the change of the composition of the atmosphere, as part of the biosphere is pumping up oxygen to it. The oxygen, in turn, results in cooling off the global temperature, making the oceans more suitable for life, and cause much more corrosion, thus a circle of interaction between all of the spheres is created.