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Enzymes are biological catalysts. They speed up chemical reactions in all living things, and allow them to occur more easily. They occur in plant cells and animal cells. ...

Cell differentiation allows a cell to specialize to achieve a specific function Multicellular organisms (eg: humans) have different types of cells which have different functions. For exam...

There are many different techniques so you have to find what works for you. The most important things are time and patience. One technique which I would really recommend is recording yourself reading out ...

Aim of question: demonstrate that the speed of a dropped object is independent of its mass, and depends only on the height it is dropped from.

Solution: equate formulae for kinetic energy and for g...

You can either quote a direct piece of the text in "" and say what passage of what book it is from. 

Or you can paraphrase what is being said in a passage of a text and specify what part ...