Explain why a plant kept in hot, dry conditions is more likely to wilt than a plant kept in cool, humid conditions.

Model answer (4 marks)

Examiner tips

• Use the word ‘explain’ to show cause–effect links; include all four points in logical order.
• Show the sequence: temperature → transpiration rate → gradient → water loss > uptake → loss of turgor → wilting.
• Use correct terminology: transpiration, stomata, turgor pressure, concentration gradient.
• Keep the answer concise – 4 marks, so one sentence per point is sufficient.

Common mistakes

• Writing only one or two of the four required points.
• Using vague terms such as ‘more water loss’ without linking to temperature or humidity.
• Forgetting to mention turgor pressure or the final effect of wilting.