The diagram shows how gas concentrations in a pond change over a 24-hour period. Oxygen and Carbon Dioxide Levels in a Pond Ecosystem Night Day Night DG 02 Concentration of Gases CO2 Which hypothesis is most likely supported by the data? O The concentration of O2 will increase during the day as a result of decreased pond temperatures. O The concentration of O2 will decrease during the night as a result of decreased photosynthesis. O The concentration of CO2 will increase during the night as a result of decreased cellular respiration. O The concentration of CO2 will decrease during the day as a result of decreased fermentation.
Nutrient Cycle
The chemical nutrients that are essential for the synthesis of living matter are taken from the physical environment. After the death and decomposition of living organisms, they are returned to the environment to be used over and again. This cyclic back and forth regenerative movement of chemical elements between organisms and their physical environment is known as the biogeochemical cycle or nutrient cycle. Since these elements serve as the essential chemical nutrients of organisms, their cyclic movements are also called nutrient cycling or mineral cycling. Minerals are not uniformly distributed all over the ecosystems but are more concentrated in specific compartments, called pools. The major biogeochemical cycles include the water cycle, nitrogen cycle, carbon cycle, phosphorus cycle, calcium cycle, sulfur cycle, etc.
Biosphere
The geologist Eduard Sues coined the term biosphere. The biosphere is characterized as a part of the earth, which includes ground and air. Moreover, the organisms on earth live in the biosphere. The biosphere is a confined area on the earth's surface where water, soil, and air combine to promote life. Several different types of life exist here.
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