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Blood from the veins is collected in the right and left atria of the heart. The atria can contract because of the impulses from the sinoatrial node (SA) (the heart’s natural pacemaker). When this happens,...

During stage 2 of the DTM, death rates started to fall due to advancements in healthcare. Vaccinations had been discovered and so programmes were introduced to inoculate babies against diseases such as sm...

The urban carbon footprint is the total set of greenhouse gas emissions emitted from a particular urban area, produced through activities such as primary footprint processes, eg. burning fossil fuels and ...

So for a 25 mark essay, being clear in your arguments is one of the most important things. You should start off with an introduction, this should include key definitions on the topic and an overview of th...

Description: Resource 6A shows a 500km chain of Hawaiian islands in the North Pacific, from the North-west (22oN 160oW) where the islands Niihau and Kauai are located, comprising of rock aged 5.2 and 4.7 ...