CAIE A Level Biology 9700 · Transport in mammals
A marathon runner becomes dehydrated after prolonged sweating without fluid replacement. Compare the composition of the runner's blood and the formation of tissue fluid in this dehydrated state with that of a well-hydrated runner.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.