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Intro: define 'most important' - for example which factor had biggest impact, caused most economic upset or the most political turmoil. Show awareness of other potential causes. State your line of argumen...

Paper chromatography is a technique used to separate coloured chemicals, such as a mixture of inks and dyes. A spot of the mixture to be analysed is spotted onto the bottom of a thin piece of chromatograp...

First scale one of the equations so that upon addition or subtraction from another of the equations we cancel one of the 3 variables, next do this again replacing one of the equations used with the unused...

Translocation