The graph below shows the cumulative volume of water lost from a plant over a 6-hour period between 09:00 and 15:00.

Determine the rate of water loss at 12:00 using the tangent line shown.
Give your answer:
Practise AQA GCSE Biology 2.3 Plant tissues, organs and systems with exam-style questions for Foundation and Higher tier. 29 questions covering 2.3.1 Plant tissues and 2.3.2 Plant organ system, matched to the AQA GCSE Biology (8461) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.