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CO₂ from respiring tissues diffuses into erythrocytes (red blood cells) where it reacts with water to form carbonic acid (process catalysed by the enzyme carbonic anhydrase). The carbonic acid...

You will never get a source that tells you nothing. Often times, you will be given deliberately odd sources, just to see if you can think on your feet. In these cases, it helps to think about the context ...

When structuring a response to a history essay question you have to show these crucial components to get high marks:you have to show in depth subject knowledge, this means dates, names, events, figures an...

Learning vocabulary for languages is both essential and difficult therefore developing easy techniques is extremely helpful when learning a language. I find little and often is the most effective way to l...

To find a gradient at a given point, first we differentiate then we sub in the x coordinate of the point. To differentiate 4(8x+2)⁴ we must use the chain rule. First we let u=...