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With these essay questions, its important to mention both similarities and differences within the two extracts to obtain maximum marks. The two main words within the question 'compare' and 'contrast' ...

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...