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In order to solve a quadratic equation by factorisation you must first find the two numbers which add up to - 8 and multiply to get 15. We can do this by trial and error - first listing all of the pairs of f...

This is through a mechanism called the countercurrent mechanism at the Loop of Henle that looks like a hair pin. It works by creating a concentration gradient between the nephron and the interstitium which a...

The structure of an introduction is simple and should follow these lines: ‘In light of this question, this is the argument I am going to make, and I intend to make it in this way’. In order to ensure it is n...

(I have underlined any keywords in this response) Break this question down into 2 halves to make it easier to answer: "What is meant by 'active transport' " : Active transport is the movement of mo...

This question uses a combination of standard differentiation and the product rule. The second part of the equation cos(x)sin(x) is the product of two funtions so the product rule must be used. Product rule: ...