09 Transpiration.pdf - Lab 9 Transpiration Multiple Choice...

Lab 9: Transpiration Multiple Choice Questions
1. Which of the following is LEAST likely to be a factor in the movement of water through a
terrestrial plant?
(A) The cohesion of water
(B) The influence of gibberellin on cell expansion
(C) Capillary action
(D) Root pressure
(E) The evaporation of water from the leaves
(1990 #3)
A scientist measured the water content of leaves from two different groups of oak
trees on three different summer days. One group of leaves, the T group, came from trees that had
been defoliated by gypsy moths the previous year. The other leaves, the C group, came from trees
that had not been defoliated. The result, in milliliters of water per gram of dry weight, are shown in
the table below.
June 10 June 30 July 28
T Group 26.8 20.4 12.7
C Group 32.5 28.7 22.7
1. All of the following are valid interpretations of these data EXCEPT :
(1986 #11)