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Fertilisers containing nitrogen are washed from fields to rivers and ponds. 2. This effectively fertilises the algae in the pond causing an 'algal bloom'. 3. The layer of algae on the surface stops sunlight ...

When there is an excess of glucose in the blood (as there would be after eating a meal), the increase in blood glucose concentration is detected by the beta cells of the islets of Langerhans in the pancreas ...

Osmosis is the movement of solvent particles (usually referring to water) from an area of low concentration (i.e. lots of water particles) to and area of high concentration (i.e. less water particles and mor...

It is the kidneys job to filter the blood and remove waste products. The kidneys are made of functional units call nephrons of which there around a million per human kidney. In the renal corpuscle filrate co...

With this question it is important to focus on the human contribution to global warming rather than explaining why global warming is happening. Start your answer by explaining that carbon dioxide and methane...