High CO2 concentration in leaf interior will cause
A. Stomatal opening
B. Stomatal closure
C. No effect on stomata
D. Stomata are destroyed
Answer: Option B
Solution(By Examveda Team)
High CO2 concentration in the leaf interior will cause Stomatal closure.Higher than ambient CO2 concentrations mediate a closure of stomatal pores in plants and conversely, low CO2 concentrations trigger the opening of stomatal pores.
Stomatal opening is induced by low CO2 concentrations, high light intensity and high humidity. By contrast, closing is promoted by high CO2 concentrations, darkness, drought and the plant hormone ABA.
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Which photosynthetic bacteria possess both PS I and PS II?
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B. Cyanobacteria
C. Purple nonsulphur bacteria
D. Green sulphur bacteria
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