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 tissues2 decreasing dehydration of leaf tissues3. countering the effect of declining co2 on photosynthesis4.reinforcing the effect of declining co2 on photosynthesis

The correct answer is 3 countering the affect of declining CO2 on photosynthesis.

Explanation:

Carbon di oxide is an important reactant of photosynthesis.The atmospheric CO2 label regulates the rate of photosynthesis.

     When the label of atmospheric CO2 decrease the photosynthesis rate also declines.

   So to countering the effect of declining CO2 on phosynthesis plants increase the number of stomata in their leaves.

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explanation: