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1. Alveoli in the mammalian lung are thin walled to allow the quick passage of gases, for example oxygen and carbon dioxide.

2. Alveoli in the mammalian lung have a large surface are...

This is a common question in C4 and the trick used to solve it is often used in sub-sections to full questions.

To solve it, we must simplify the expression in terms of cos(2x) using two trigonomet...

Politics since 1997 have been first dominated by the Labour govenment (97-2010), as well as the Coalition government (2010-15). The last two years have seen a majority Conservative govenment. In this time...

First we draw a picture, to visually see what the question is asking. A simple set of coordinate-axes and notches so we can accurately put our point P and Q, though being accurate isn't important it will ...

Agreement with the view; the low church attendance figures as evidence for a more secular society. With this idea that religion is of the past and less influenctial today. Weber believed western societies...