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Within a gene pool of a population, there is genetic variation, due to mutation. This leads to phenotypic variation. Some individuals will be better adapted to the environment than others and will ther...

Fertilisers are generally high in nitrogen, to replenish the nitrogen in the soil assimilated by the crop plants. When this is drained into lakes in run-off, it can cause dramatic consequences. Nitroge...

All too often, A level language students fret about entering the exam room about to write an essay they haven't been able to prepare for and which they'll likely know little about. No need to worry tho...

Step 1:

We begin solving this problem by finding the gradient of the tangent line at H, which is equal to dy/dx.

In this case, our curve has equations  x = 3sinθ and ...

Step 1:

When asked to exrpess something in partial fractions, we first compare the power of the numerator to the power of the denominator.

In our case we have that th...