In order to conserve H2O, land plants will close stomata to minimize transpiration, but closing stomata lowers CO2 concentration in the leaf. Drought thus __________ because __________
A. lowers photosynthesis; photorespiration
increases
B. lowers photorespiration; photosynthesis
increases
C. lowers photosynthesis; H2O is not
available
D. increases photosynthesis; photorespiration
increases
E. increases photosynthesis; CO2 increases
A
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