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Describe and explain two ways in which alveoli in the mammalian lung are adapted for efficient gaseous exchange

Alveoli in the mammalian lung are thin walled to allow the quick passage of gases, for example oxygen and carbon dioxide. Alveoli in the mammalian lung have a large surface area which allows for the diffusio...
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Answered by Guy A. • Biology tutor
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Integrate the expression cos^2(x).

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 trigonometric identi...
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Answered by Rohan T. • Maths tutor
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In 'Do Not Go Gentle Into That Good Night', how does the poet present the speaker's feelings about his father?

Dylan Thomas’s poem is concerned with the rush of emotions his speaker encounters upon the realisation of his father’s imminent death. Indeed, it is from this liminal space – between life and death – that th...
WA
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Assess the significance of the constitutional reforms introduced since 1997.

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, a...
EM
10123 Views

Find the gradient of a straight line with the points P(5,3) and Q(8,12)

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 giv...
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Answered by Alexander G. • Maths tutor
4457 Views