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The hormone Human Chorionic Gonadotrophin (HCG) starts to be secreted six days after conception from a developing embryo. A pregnancy test stick has three bands. In the first are monoclonal antibodies whi...

In spite of of the Tsar’s reformist intentions, the emancipation of the serfs starting in 1861 produced largely negative effects. Intended to improve the social conditions of peasants and to spur an impro...

Recall that the derivative of exp(x) is exp(x), but notice this question is slightly more complex due to the x^2 term. This is example of differentiationg composite functions, and so the chain rule is req...

Aluminium has a lower first ionisation energy than magnesium. This is because it's outer electron is in a p-orbital in comparision to magnesium's outer electron which is in an s-orbital. The outer electro...

It helps to be formulaic when approaching a broad essay title such as those found in an A Level Spanish paper. For example, if faced with the AQA June 2016 question - ¿Se puede decir que la representación...