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在生物课教学中,可用塑料袋代替实验仪器,做一些植物生理实验。一、证明种子萌发时,胚在进行呼吸的实验 1 证明吸入氧气实验前一天,把正在萌发的种子(干重4至5两)装到长29厘米、宽24厘米的透明塑料袋里,然后闭合袋
In the teaching of biology, plastic bags can be used instead of experimental equipment to do some plant physiological experiments. 1. Evidence of Embryo Breathing in Experiment 1 of Evidence of Germination When the germination of the germinated seeds (4 to 5 in 2 dry weight) is loaded into a transparent plastic bag 29 cm long by 24 cm wide Close the bag