题干

在两个相同的密闭、透明玻璃室内各放置一盆长势相似的甲、乙两种植物幼苗,在充足的水分、光照和适宜的温度等条件下,用红外线测量仪定时测量玻璃室内的CO2含量,结果如下表(假设实验期间光照、水分和温度等条件恒定不变)。下列有关叙述错误的是(   )
记录时间(min)
0
5
10
15
20
25
30
35
40
45
甲种植物(mg/L)
150
113
83
58
50
48
48
48
48
48
乙种植物(mg/L)
150
110
75
50
30
18
8
8
8
8

A:在0~25 min期间,甲和乙两种植物光合作用强度都逐渐减小

B:在0~25 min期间,影响光合作用强度的主要因素是CO2含量

C:在0~25 min期间,CO2含量逐渐降低是有氧呼吸减弱的结果

D:上表数据说明,乙植物比甲植物固定CO2的能力强

上一题 下一题 0.0难度 选择题 更新时间:2012-08-21 02:21:44

答案(点此获取答案解析)

C

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