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For a question like this you should aim to eliminate either x OR y from one equation in order to deduce the value of the other. 1) 2x +5y + 5= 0 , 2) 2y + 31= 5x
Rearrange equation 2) so that 2y +31...

Active transport and diffusion.
Glucose is transported by active transport, against the concentration gradient, from the gut into intestinal epithelial cells. Whereas glucose is transported by facili...

With questions focusing on two contrasting pieces, it is sometimes difficult to find areas of similarity. If you can, this can be a useful starting point for exploring the differences. An effective approa...

It can be argued that Mary’s marriage to Philip forced England into a diplomatic relationship with Spain which led to Spain dominating England’s foreign policy interests, particularly Philip realised that...

Alexander II was the ruler of Russia in years 1855-1881. These were times of raging tensions as Russia lost its international position after the Crimean War in 1855. Alexander II was called the 'Tsar Lib...