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Cancer cells are not foreign cells, but abnormally functioning body cells, and may therefore escape immune detection, which is one of the reasons why they are so difficult to treat. 

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The key to a question like this is making sure to include multiple tenses, even if the question only expressly hints at one. This should be an opportunity to show your knowledge of the past perfect and im...

As with any essay, you should start with an introduction that directly addresses and answers the given question, and outlines in brief the points your essay will explore. A little background knowledge her...

First, pick a quote! It should not be too long, half a sentence is often a good length. Read your quote out loud and take notice of any pauses you take, how fast you read it, and any words that seem to st...

First, read the question carefully a couple of times, and underline the key words. Think of a couple of synonyms for these that you can use later on to stop your essay from becoming too repetative. Come u...