Question 46

(Multiple Choice)

Evidence indicates that plants increase the number of stomata in their leaves as atmospheric CO₂ levels decline.Increasing the number of stomata per unit surface area should have the effect of doing which of the following?
1)increase dehydration of leaf tissues
2)decrease dehydration of leaf tissues
3)counter the effect of declining CO₂ on photosynthesis
4)reinforce the effect of declining CO₂ on photosynthesis
5)decrease the O₂ content of air next to the leaves to a level lower than it would otherwise be
6)increase the O₂ content of air next to the leaves to a level higher than it would otherwise be


A)1, 3, and 5
B)1, 3, and 6
C)1, 4, and 5
D)2, 3, and 6
E)2, 4, and 5

Answer