下图为探究酵母菌进行的呼吸作用类型的装置图,下列现象中能说明酵母菌既进行有氧呼吸,

2025-03-13 22:52:56
推荐回答(2个)
回答1:

装置2; A;
①错 影响bc段光合速率的因素是光照强度,但c点后影响光合速率的根本因素是温度【由于夏天中午时间段温度过高,植物蒸腾作用加强,失水加快,为了避免大量失水,叶片会关闭部分叶孔,导致co2浓度降低←直接原因,光合作用减慢】。
②错,FG段是因为太阳慢慢落下,光照强度变弱
③错,co2吸收量是等于净光合作用的量,C点co2吸收量高只是那时的净光合作用速率高,但是C点到E点之间并没有co2吸收量小于零【呼吸作用大于光合作用】的事情发生,所以有机物累积量依然是E点比C点高,所以E时叶片比C时重,且全图中最重的是G点叶片
④我没大看明白 ,一瞬间,有机物的产生量=总光合作用的量- 呼吸作用的量=净光合作用的量=co2的吸收量,由图知co2吸收量C大于F大于E,与有机物生产量相等矛盾啊 这个....
⑤错,前面已经解释E点光合作用低的原因,直接原因是co2浓度减少,C5+CO2生成两个C3,CO2偏少就是少了原料,所以E点的C3更低
⑥错,白天出现B点现象的原因是总光合速率=呼吸作用速率,净光合作用速率为0,但是晚上不进行光合作用,一直进行呼吸作用,所以一天下来该植物的重量会减小!

第四个问确实不太清楚,坐等大神解答.....边做题边打字真是够了....

回答2:

2、A

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