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This is a form of movement of molecules. This is the movement of molecules from an area of low concentration to an area of high concentration (against the concentration gradient) across a membrane. As it ...

Energy is not transferred in a standing waves whereas in progressive waves energy is transferred in the direction the wave is travelling in.In standing waves, nodes and antinodes exist which are the point...

Meiosis is a mechanism of sexual cell division used to generate gametes, or sex cells, in reproductive organs. For example, generation of eggs in ovaries. By contrast, mitosis is an asexual method of cell...

Firstly, Keep it simple. This might seem counter-intuative, surely you want to wow the marker with your mastery of the finer points of the english language? The fact is though if...

Let's do an example. Sketch: y=x^3 - 2x^2 - x + 2. First we need to find out where the curve crosses the x and y axes. Look at the x axis first. We factorise the expression if we can. The best method ...