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To differentiate a function of the form y=a^x you need to use a neat little trick to rewrite a^x in the form of something you already know how to differentiate. Using the fact that e^ln(x) is equal to x, ...

Inside the kidneys there are millions of nephrons which filter the blood. They do this by having blood build up a high pressure in the glomerulus (a ball of capillaries) so that the small molecules (e.g. ...

Your heart pumps blood from its left side, through the aorta (the main artery leaving the heart) and into the arteries. The blood travels through your arteries, which divide off into smaller and smaller b...

In this extract Jane demonstrates her intellectual strength through the eloquence of her passionate speech. Bronte uses a series of rhetorical questions to express Jane’s frustrations towards Rochester, r...

plants uses carbon dioxide during photosynthesis. plants use carbon to make carbohydrates and cellulose. animals then eat plants and carbon is passed down. Animals then respire and release carbon dioxide ...