An investigation was carried out to compare the rate of transpirational water loss in two different plant species, Species A and Species B, over a 6-hour period. Both plants were kept in identical environmental conditions.
The cumulative volume of water lost by each plant was recorded and plotted in the graph below.
a.[2]
Calculate the difference in the volume of water lost by Species A compared to Species B at 3 hours. Show your working.
b.[4]
Calculate the average rate of water loss for Species A between 3 hours and 6 hours. Include the correct unit in your answer.