单选题:将某植物放置在黑暗处一昼夜后,选取一个叶片按图1处理。照光几小时后,经脱色、漂洗再用碘液处理,结果如图2所示。本实验能说

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题目内容:
将某植物放置在黑暗处一昼夜后,选取一个叶片按图1处理。照光几小时后,经脱色、漂洗再用碘液处理,结果如图2所示。本实验能说明(  )。

①光合作用需要光②光合作用需要二氧化碳
③光合作用需要叶绿体④光合作用放出氧气
⑤光合作用制造淀粉 A.①③
B.②④
C.③⑤
D.①⑤

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