错误做法:

Stating that increasing temperature in a glasshouse always increases yield

原因:

Temperatures above the optimum for plant enzymes denature enzymes, stopping photosynthesis and reducing or killing crops

正确做法:

Specify that temperature is raised only to the optimum value for the crop being grown

错误做法:

Forgetting to give both advantages and disadvantages of pest control methods in evaluation questions

原因:

Mark schemes allocate half the marks for pros and half for cons, so unbalanced answers get half marks maximum

正确做法:

Structure evaluation answers with 2-3 advantages and 2-3 disadvantages for each method before a conclusion

错误做法:

Stating that yeast produces lactic acid during bread production

原因:

Yeast produces ethanol and CO₂ during anaerobic respiration; lactic acid is produced by Lactobacillus in yoghurt production

正确做法:

Link the correct microorganism to its correct respiration product and food product in answers

错误做法:

Listing fermenter conditions without explaining their purpose

原因:

Exam questions usually ask you to explain why each condition is provided, not just list them

正确做法:

Pair each fermenter condition with its specific function, e.g. 'agitation to evenly distribute nutrients and oxygen'

错误做法:

Confusing intraspecific and interspecific predation in fish farming answers

原因:

Intraspecific = same species, interspecific = different species; mixing these up costs marks

正确做法:

Use prefixes to remember: 'intra' = inside (same group), 'inter' = between (different groups)

错误做法:

Claiming that biological control has no disadvantages

原因:

Biological control has specific downsides including slow action and risk of the control species becoming invasive

正确做法:

Give balanced answers for all comparison questions, including pros and cons for both methods