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Take the example 2x² + 7x + 3 = 0

1. To factorise we need to use the general equation 'ax + bx - c = 0'   where in our case a = 2 b =7 c=3.

2. First we need to mulitply the ...

As the action potenial reaches the synaptic terminal depolarisation causes voltage-gated Ca²⁺ channels to open. The opening of these ion channels causes an influx of Ca²⁺ ions be...

The list is endless when it comes to what you can say about poetry, however for the purposes of an exam, it is often helpful to have a mental checklist of key concepts to look out for. 

Cell wall:

Only present in plant cells, it provides structure and is completely permeable to biological molecules.

Cell membrane:

Much thinner than cell wall and is p...

It can often be difficult when answering an essay question to clearly phrase your answer without losing sight of your main point and waffling. An incredibly helpful way of improving your writing style...