Movement of molecules without the input of energy is called

Energy 
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Bacteria is economically important because the microorganisms contributes to rising the nitrogen in the soil from the atmosphere. The plants are immersed into hydrolys the substance off the cell wall and separates the fiber which is a process mainly used in agriculture. Bacteria acts on dead bodies of animals and plants and cover various complex organic compounds into simple inorganic substances meaning bacteria helps in the recycling of matter.