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There are of course many ways to begin to harmonise a Bach Chorale; I would advise identifying the key of the soprano line, by looking at the key signature and the accidentals (sharpened sevenths of the m...

Phagocytes are part of the innate immune system. They are primarily responsible for clearing extracellular infections e.g. bacteria or fungus, by recognising and ingesting the pathogen. Typically, pathoge...