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An adverse socio-economic consequence of population movements for source countries across Europe is the brain drain. The brain drain is a geographical term which is used to explain the socio-economic phen...

When analysing a child’s piece of writing there are certain things to look out for that we don’t use when analysing speech. For example, we can study orthography (the spelling of words), graphemes (letter...

One way of improving A-level literature essays is demonstrating a good knowledge of different tenses and moods. The correct use of the subjunctive mood is usually key to showing the examiner your extensiv...

DNA helicase unwinds DNA by breaking H bonds between DNA strands. DNA polymerase joins adjacent nucleotides by forming phosphodiester bonds between them.

We can find dz/dy using chain rule dz/dy=dz/du x du/dy (1) by defining u=3y^2+5 (since the exponent of e is a function of y we call this function u) and rewrite z=e^u. Then, we find dz/du=e^u (2) and du/d...