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Some animals contain haemoglobin molecules which are structured in way which allows them to have a high affinity for oxygen whilst some are the complete reverse. The reason for this is all to do with the ...

The polymerase chain reaction (or PCR) is extremely useful at copying fragments of DNA so by the end of it you have a much bigger sample than what you started with. This is particularly useful for example...

Having to analyse an unseen passage or poem in an exam can be very daunting and it’s often tempting to panic when you first see what you’ve been given. The most important thing to do, however, is to stay ...

Although these two words can be used interchangably they are very very different. Its easier to explain if you break down their equatoins.

Speed = distance / time
V...

Sin(x), Cos(x) and Tan(x) are very useful functions and can be used to solve algerbraic problems where the aim is to find the size of an angle or a size.

Sin(x) = Opposite/Hypotenuse