在环境中CO2浓度一定、温度适宜的情况下,测定植物叶片在不同光照

在环境中CO2浓度一定、温度适宜的情况下,测定植物叶片在不同光照条件下CO2的吸收或释放量,结果如表(表中负值表示CO2释放量,正值表示CO2吸收量)

下列选项中正确的是(     )

A.光照强度在8.09.0klx之间时,细胞内合成ATP的速率不变

B.光照强度在2.0klx时,细胞内光合作用小于呼吸作用

C.光照强度在8.0klx时,细胞既吸收CO2又吸收O2

D.超过9.0klx时,光合作用速率不再增加,此时主要是受CO2浓度和温度的制约

答案

B

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