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When you want to report what someone said you can either do it by repeating their exact same words, which is called direct speech, or you can use reported speech. When we use reported speech, the main ver...

The price of the bag has been reduced by 20% therefore the sale price of the bag is 80% of the full price. If we divide the sale price by 80 to get 1% of the price, we get £29.40/80 = £0.3675. We then mut...

There's a mnemonic I used to use which I found really helpful to remember the ethical guidelines; When Doing Psychology Do Do It Correctly (W.D.P.D.D.I.C). Each one of these letter then refers to an ethic...

Active immunity occurs when an individual develops immunity against a specific antigen when they are exposed to it - your body reacts by producing memory cells that provide long lasting immunity against t...

An antigen is a substance that is introduced to the body and stimulates an immune response and the production of antibodies. Antibodies are proteins produced by cells in the body in in repsonse to the pre...