Aqa Bio Unit 5 Essay Pack

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AQA – Biology Unit 5 The Essay: 1 Marking the essay Scientific content Is the essay Good (12 marks) Medium (8 marks) Poor (4 marks)? Insert mark Do you want to go to the intermediate mark? Insert new mark Put a tick in the box for each significant reference to material that is beyond that required at A-level Final mark for scientific content If the essay has been classed as good, add 2 marks if there is one tick in the box, or 4 marks if there are two or more ticks. Breadth Topic Tick box if at least one “paragraph” on topic Topic Tick box if at least one “paragraph” on topic Physiology Direct effects Indirect effects Relevance Pathogens Life style Genetics Give one mark for each box ticked Put a cross in the box for each significantly irrelevant comment Number of crosses None 2 More than 2 Number of marks 3 2 1 Quality of written communication Award 3 marks Award 2 marks Poor use of either scientific terms or lacking coherence Mark for quality of written communication Award 1 mark Poor use of scientific terminology and lacking coherence 2 What are the examiners looking for: What you should consider: Look at this title: ‘Carbon dioxide may affect organisms directly and indirectly Describe and explain these effects. ‘ Enzymes pH Light independent reaction Limiting factors Ecology Crop production Pest numbers Change in range Selection Bohr effect Physiology Control of heart rate Cells Carbon dioxide Genes Global warming 3 Try marking this essay.................... Carbon dioxide may affect organisms directly or indirectly. Describe and explain these effects. Carbon dioxide is both a vital requirement for producers – the first organisms in any food chain, and at times a dangerous waste product. Where plants use carbon dioxide during the Calvin cycle of photosynthesis, at night they

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