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Tsar Nicholas II's abdication came against a backdrop of a changing political, social and religious nation but the catalyst for change came through Russia's struggles in the First World War. Nicholas was ...

Generally, while this differs in term of exam board specification and type of question, two or three as focal points seems to be a fairly good rule of thumb. Any more prevents adequate discussion and mean...

The proportion of the population with genotype Bb can be calculated using the two equations of the Hardy-Weinberg principle. These equations are: p + q = 1  where: p = frequency of the do...

A pure public good is a good that is consumed collectively; it is both non-excludable and non-rivalrous. These two main characteristics mean that people can't be stopped from consuming the good, and that ...

The primary ingredient for a volcano is magma. Magma is what we call melted rock. When rocks melt at depth they become less dense than the solid rocks around them and therefore they rise to the surface of...