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To rationalise a surd means to manipulate a fraction involving terms which are being square rooted so that no term in the denominator is being square rooted. For this example 2/root(x) we multiply the fra...

An A level question requires a sound structure in order for the content to answer the question. The standard point, evidence, explain structure can be developed in order to meet the required assessment ob...

The main difference to consider would be that sympatric speciation occurs in the same habitat and population while allopatric speciation requires a geographical barrier between subsets of the population. ...

A tone row is a series of notes in a fixed order, like a melody or riff but with no rhythmic values assigned to the pitches. Most commonly it contains all 12 tones of the chromatic scale just once, such a...

Deoxygenated blood enters the right atrium of the heart via the superior & inferior vena cavae. The atria contract and the right atrioventricular valve opens, allowing the blood to enter the right ven...