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Question 6:, Name the microorganisms which can fix atmospheric nitrogen in the, , soil., Answer:, , Bacteria such as Rhizobium and certain blue-green algae present in the, soil can fix atmospheric nitrogen and convert it into usable nitrogenous, compounds. These nitrogenous compounds can be easily utilized by, , plants for the synthesis of plant proteins and other compounds., , Question 7:, , Write 10 lines on the usefulness of microorganisms in our lives., , Answer:, , Micro-organisms are too small to be seen through naked eyes. However,, , they are vital to plants and the environment., , Importance of microorganisms:, , They are used in winemaking, baking, pickling, and other food making, , processes., , Alcoholic fermentation by yeast is widely used in the preparation of wine, , and bread. A bacterium Lactobacillus, promotes the formation of curd., , Microbes are used to reduce pollution. For example, decomposers such, as bacteria and fungi break down dead bodies and excreta to form, , inorganic compounds, which can be absorbed by plants., , They are used to increase the soil fertility by fixing the atmospheric, nitrogen with the help of bacterium Rhizobium and some other, , blue-green algae., , Microbes also play an important role in the preparation of medicines., , Antibiotics are chemicals produced by microorganisms to kill bacteria.