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This question is asked a lot at GCSE level, and it can be approached in many different ways. You must think about the family vocabulary that you are familiar with. Think of words for family members, what ...

Whilst most students will refer to Kachru's 'Circles' model. Another useful theorist to remember is Schneider, who proposed the dynamic model. Schneider studied how English becomes established around the ...

There are 3 types of stationary points for functions: a maxima, a minima and a saddle point. They all occur when the derivative of a function, f(x), is equal to 0, e.g. f'(x)=0. Therefore in order to find...

The small intestine has many adaptions that help effective absorption to take place. Firstly it is very long, meaning there is a lot of time for nutrients to be absorbed. Secondly it has villi which are f...

Optimum pH for enzymes in the human body is 6. It's a bell shaped Graph. At Higher or lower pH, the alkalinity/acidity denatures the enzyme, which changes the shape of the active site, and so the substr...