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There is no particular content that you should revise before taking the HAT. The HAT is not made to test your knowledge but to test your skills - particularly your ability to analyse sources and to constr...

The movement of water molecules from an area of high water concentration to an area of low water concentration.

Use the mark schemeIt is important to really understand the mark scheme for your particular exam board and qualification to see exactly what they are looking for. Often the mark scheme will include...

It has a bi-concave shape which means that it has a larger surface area, so that more Oxygen and Carbon Dioxide can move in and out.It has no nucleus to allow maximum amounts of haemoglobin (a protein tha...

γιγνωσκω - γνωσομαι - ἐγνων - ἐγνωκα - ἐγνωσμαι