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When Kennedy came into power in January 1961 he made a famous speech in which he said they would fight anyone to 'assure the survival and success of liberty'. By 1961 Fidel Castro was firmly on the side o...

In order to move to the top band of marks, it is important to not just describe and explain, but to give your own point of view on the issue. Giving your judgement is the key to getting the top marks. Aft...

In English, less and less people use the subjunctive, so it can be hard for us to recognise when it is needed in Spanish. However, we can generally follow this rule: when there is any level of doubt or un...

A waterfall is created due to the banding of rocks with varying hardness and softness. The harder rock (granite) is more resistant to erosion and so erodes at a different speed to the soft (sandstone). Th...

Firstly, an enzyme is a specific protein with a unique shape. The main aim of an enzyme is to CATALYSE a reaction. This means, the reaction is sped up, but the concentrations of reactants or products are ...