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How can I critically evaluate a study?

To critically evaluate a study at A-level, I recommend following the ‘GRAVE’ method: G eneralisability - how generalisable is the sample to the wider population? Is the sample size large or small? Does it on...
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Answered by Ellie P. • Psychology tutor
2621 Views

Compare and contrast eukaryotic and prokaryotic cells.

Tip: when answering ‘compare and contrast’ questions, use keywords such as ‘whereas’, ‘in contrast to’, ‘similarly’ and ‘comparatively’.Eukaryotic cells are plant and animals cells, whereas prokaryotic cells...
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Answered by Ellie P. • Biology tutor
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What is the difference between the verbs 'ser' and 'estar' (meaning 'to be' in English)?

Both of these verbs are irregular, and mean 'to be', but for different situations.Ser is used when talking about permanent, or lasting attributes, the essential essence of something. A helpful acronym to rem...
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Answered by Angharad M. • Spanish tutor
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(19x - 2)/((5 - x)(1 + 6x)) can be expressed as A/(5-x) + B/(1+6x) where A and B are integers. Find A and B

First we can equate (19x - 2)/((5 - x)(1 + 6x)) to A/(5-x) + B/(1+6x) which means: (19x - 2)/((5 - x)(1 + 6x)) = A/(5-x) + B/(1+6x). Then we will turn the RHS into a single fraction: (19x - 2)/((5 - x)(1 + 6...
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Answered by Tarek S. • Maths tutor
3974 Views

Explain the process of phagocytosis

Phagocytes detects pathogen due to chemical produced by the pathogen. The phagocyte move via a concentration gradient to the pathogen. The phagocyte engulfs the pathogen thereby producing a phagosome where t...
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Answered by Sam C. • Biology tutor
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