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gas exchange occurs in the alveolus of the lungs. Alveoli provide a good surface for gas exchange to take place.They provide a large surface area to volume ratio which increases the amount of gas that can...

when integrating a function which describes a certain curve, the answer we get gives us the area under the curve. When integrating a general polynomial you simply add 1 to the power and divide by the new ...

Eutrophication is the process whereby excess fertiliser is added to fields by farmers. This fertiliser contaisn nitrates which are very sioluble and so easily runs off into rivers and lakes. Plants use ni...

The question is asking us to "solve" the equation which means we need to find the missing variable. In this case, x is our missing variable so our goal is to get all the x's on ...

On utilise 'y' pour remplacer la préposition 'à' quand c'est après un verbe. Par exemple si tu dis ' je pense à ce enjeu' (I'm thinking about this issue) tu enleves le 'à' et tu mets le 'y' devant le verb...