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Phospholipids and proteins regulate the movement of substances through the membrane, thereby allowing the membrane to be selectively permeable . This is important since it allows the cell to, for example, ma...

You can not integrate tan 2 x but you can integrate sec 2 x Since sec 2 x = 1 + tan 2 x Then tan 2 x = sec 2 x-1 so the intragral of tan 2 x dx = the integral of (sec 2 x-1) dx = intrgral of sec 2 x dx + int...

We can expand following any row or column we want. A wise choice would be to use a row/column in which we have one or more zero entries to reduce the calculations. From this, we pick the first entry on the c...

It is good practice in physics to draw a diagram of the situation, so the first thing we want to do is create a picture of the problem, focussing on the object on the slide. Now we need to analyse what is ha...

Fair trade farmers receive a guaranteed price for their produce (e.g. cocoa, bananas) therefore they have higher and more secure income in comparison to non-fair trade. This is beneficial for producers as it...