A scientist investigated the rate of transpiration in grey mangrove (Avicennia marina) leaves over the course of a day. The results are shown in the table below:
| Time of Day | Rate of Transpiration (mg dm−2 h−1\text{mg}\,\text{dm}^{-2}\,\text{h}^{-1}mgdm−2h−1) |
|---|---|
| 07:00 | 120 |
| 09:00 | 210 |
| 11:00 | 330 |
| 13:00 | 270 |
| 15:00 | 180 |
Explain the change in the rate of transpiration between 07:00 and 11:00.
Calculate the percentage increase in the rate of transpiration from 07:00 to 11:00. Show your working.
Cells of mangrove roots are adapted to survive in highly saline environments. Describe an experiment that you could perform to determine the concentration of sodium chloride (NaCl\text{NaCl}NaCl) solution that is isotonic to the cytoplasm of these plant cells.
You are given:
