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They are experiments in which the subjects are unaware of whether they are recieving a real or fake drug treatment.
As a result, they help reduce bias and placebo ...
It is vital that you look at who wrote both primary and secondary sources.
You probably know from GCSE that primary sources may be heavily influenced by all manner of characteristics belo...
Define competition: competition is an interaction between organisms where one organism has a negative effect on the fitness of the other organism
Define interspecific competitio...
The imperfect subjunctive in Spanish expresses what the present subjunctive would, but is used when talking about a situation in the past. In order to form it, firstly you would need to take the third per...
Most students at GCSE are taught to use the structure of PEE (Point Evidence Explanation) in each of their paragraphs in order to construct their argument. However, A-level requirements differ, as exam...
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