SSC MTS EXAM

Detailed explanation-1: -Plants provide the oxygen we breathe, remove the carbon dioxide we exhale, and, through transpiration-the biologically controlled evaporation of water from plant leaves-provide much of the water that rains on our crops and fills our reservoirs.

Detailed explanation-2: -The Biosphere is the sum of all the Earth’s ecosystems. This also has some free oxygen produced from photosynthesis and other life processes. The largest reservoir of oxygen is the lithosphere.

Detailed explanation-3: -Scientists estimate that roughly half of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton-drifting plants, algae, and some bacteria that can photosynthesize.

Detailed explanation-4: -The atmosphere is the layer of air that stretches above the lithosphere. The Earth’s water-on the surface, in the ground, and in the air-makes up the hydrosphere. Since life exists on the ground, in the air, and in the water, the biosphere overlaps all these spheres.