A Complete Collection of 100000 Whys
Fav十万个为什么
为什么种子会发芽？
1、种子内部含有胚胎植物，这是发芽的基础，胚胎植物在适宜条件下开始生长。
2、水分是发芽的关键，水分使种子吸胀，打破休眠状态，激活生命活动。
3、温度影响酶的活性，适宜的温度能加速种子内部化学反应，促进发芽。
4、光照为植物生长提供能量，某些种子需要光照才能发芽，而有些则需要在黑暗中。
5、土壤中的养分和空气中的氧气为种子发芽提供必要的物质支持。
总之，种子发芽是内部生命力和外部环境条件共同作用的结果，是植物生命延续的重要方式。
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