QUESTION 3 In a spontaneous reaction O A. the total amount of energy in the reacting system increases O B. the total amount of energy in the reacting system decreases O C. More energy is created than is used O D. free energy of the reactants is greater than the free energy of the products E. free energy of the products is greater than the free energy of the reactants QUESTION 4 Coupling 2 reactions O A. makes the non spontaneous reaction become spontaneous B. pairs an endergonic reaction with an exergonic reaction C. allows for a series of reactions to have a net positive delta G D.A and B OE. A and B and C QUESTION 5 Breaking down glucose in cellular respiration O A. allows the cell to make energy B. transforms energy from the chemical bonds of glucose C. is a catabolic reaction O D.A and B O E. B and C
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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