Students investigate the rate of transpiration in a laurel leaf using a potometer. In one part of the investigation, they measure the volume of water absorbed (in microlitres, μL\mu\text{L}μL) over a 15-minute interval in three separate trials under a constant wind speed of 2.5 m s−12.5\text{ m s}^{-1}2.5 m s−1.
The table below shows their results:
| Trial | Volume of water absorbed (μL\mu\text{L}μL) |
|---|---|
| Trial 1 | 45.3 |
| Trial 2 | 46.8 |
| Trial 3 | 44.9 |
Calculate the mean volume of water absorbed. Give your answer to 1 decimal place.
44 exam-style questions on OCR GCSE Biology Practical skills. Each one has a worked solution and a mark scheme showing where the marks go.