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1. Waste (e.g. carbon dioxide)

Carbon dioxide is a waste product of respiration, which ends up dissolving in the blood plasma. This can cause the blood pH to decrease, which will ultimate...

The key for me in answering this question can be found in the structural appraoch - Introduction/ Similarities/ Differences/ Conclusion on the overall defining effect of theme X. 

Introduction: Bre...

This can be proven by understanding tan(x) and it's inverse as functions, using implicit differentiation, subsitution and by recognising trigonometric identities (or being able to prove them from first pr...

One of the main things to remember when it comes to an A Level English Language essay is that you have a completely different aim to when you are writing an English Literature essay. Whilst during Lit ess...

Firstly write out the equation x² - 9x + 20 = 0. The aim is to find two numbers that multiply to make 20 and add up to make -9. Look at the constant without any x's , in this case it is 20. We ...