AQA GCSE biology paper 3Watch
Found it easy, although 5bii (the plant in a plastic box) was tough. I said the rate would decrease because the insides of the box would be saturated, but other people talked about carbon dioxide.
The question was about transpiration so I don't think CO2 would be right... I put there would be no wind so less evaporation from the leaves so slower rate of transpiration.
The carbon dioxide was because of stomata opening or closing. I did think about that but I couldn't figure out which way it would go (would they open to allow more carbon dioxide in or would they close to slow photosynthesis). I just decided not to write about it - I stuck with water.