?以测定植物黑暗中二氧化碳的释放量和光照下二氧化碳的吸收量为指标，研究温度对绿色植物光合作用呼吸作用的影响，结果记录如下表。下列有关分析中正确的一项是（）。
- A.该植物在25℃条件下，光合作用制造的有机物最多
- B.在35℃条件下，该植物实际光合作用速率与呼吸作用速率相等
- C.在15℃条件下，该植物的净光合作用速率为1.5h
- D.光照相同时间，35℃时光合作用制造的有机物总量与30℃时相等
正确答案及解析
正确答案
解析
绿色植物制造有机物的量（实际光合作用量）=呼吸量+净光合作用量。由题中数据可知A项错，30℃与35℃条件下植物制造有机物的量最多，为6.4／ｈ；B项错，35℃实际光合作用速率＝3.2＋3.2＝6.4／ｈ；C项错，15℃时，净光合作用速率应为2.5／ｈ
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