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The capillaries deliver blood that has high carbon dioxide levels and low oxygen levels and take away blood that has high oxygen levels and low carbon dioxide levels. This means there is always a concentr...

1 mark each for each of these points:similarities:only contain carbon atomsatoms covalently bonded to each otherlattice structuredifferences:diamond has four covalent bonds and graphite has threediamond h...

One good way to improve your essays is to use real world examples and data to backup your arguments. For example when explaining some of the advantages of a monopoly use examples from the real world. For ...

Identifying metre can be tricky, since it is sometime quite subtle. However, the easiest way to find the metre is to read the text out loud, placing additional emphasis wherever it feels natural. This wil...

Substitute y = 2x - 1 into the first equation.

2x + 3(2x -1) = 21

2x + 6x - 3 = 21

8x = 24

x = 3

Therefore y = 2(3) - 1 = 5