Question

The reservoir pool for gaseous cycles of the matter is
A. Atmosphere
B. Hydrosphere
C. Both (A) and (B)
D. Lithosphere

Answer 1

Hint: The various gaseous cycles of matter include the carbon dioxide cycle, oxygen cycle, and nitrogen cycle. These cycles show how the various gases and states of matter are recycled within the earth. All these cycles involved different states of matter of each compound being cycled within the biosphere.

Complete answer:
The atmosphere is the space where all gas entities are present, the air and the space above us can be considered the atmosphere. The hydrosphere is all the water bodies present on the earth, such as ocean, rivers, lakes, etc. the lithosphere is the terrestrial land that is present on the earth such as the soil, the continents, the layers of the earth, etc. and when all these are present together we denote them as the biosphere, for example, the entire earth.

For the biosphere to function several vital components need to be present such as oxygen, carbon dioxide, nitrogen, water, etc. these components are routinely recycled within the biosphere to maintain the ecological balance and functioning of the biosphere. The cycling could be gaseous, hydrological, or sedimentary. Gaseous cycles are predominantly dependent on the reservoirs of gas present within the atmosphere. Examples of gaseous cycles include the oxygen cycle, the carbon dioxide cycle, and the nitrogen cycle.

Therefore, the correct option is A.

Note: Even though the gases are cycled between various spheres of the biosphere the primary reservoir is in the atmosphere. Sedimentary cycles such as the carbonate cycle and the phosphorus cycle involve the lithosphere where carbonate of phosphorus is recycled within the ocean beds of soil by several bacteria and other lithosphere dwelling organisms. Whereas the water cycle is a hydrological cycle where the reservoir is in the hydrosphere.