Evidence Indicates That Plants Increase the Number of Stomata in Their

question 40

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) increasing dehydration of leaf tissues
2) decreasing dehydration of leaf tissues
3) countering the effect of declining CO₂ on photosynthesis
4) reinforcing the effect of declining CO₂ on photosynthesis
5) decreasing the O₂ content of air next to the leaves lower than it would otherwise be
6) increasing the O₂ content of air next to the leaves higher than it would otherwise be

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

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