Investigating:Identifying the main sites of tranpiration
Step 1 Place a celery stem,with its leaves intact,in a beaker of coloured water as in Figure 1.17.
Step 2 Place a second stem of about the same weight,but with all its leaves removed,in another beaker of coloured water.
Step 3 After 20 minutes,remove both stalks and cut the stems at regular intervals to see how far the coloured water had risen.
The rate of transpiration is fastest where water rises the furthest.Which factor enabled the water to rise the furthest?