The Complete Book of 100,000 Reasons Why
lit. ten thousand reasons why
为什么有些植物能耐受干旱？
1、有些植物拥有特殊的生理结构，如厚实的肉质茎或叶片，可以储存大量水分，帮助它们在干旱环境中生存。
2、这些植物通常具有发达的根系，能够深入土壤深处吸收更多的水分，即使表层土壤干燥也能获取水源。
3、它们叶片表面有一层蜡质或绒毛，可以减少水分蒸发，提高水分利用效率。
4、一些植物能够通过关闭气孔来减少蒸腾作用，从而降低水分流失，适应干旱环境。
5、某些植物具有休眠或半休眠的机制，在干旱季节进入休眠状态，减少生命活动以保存水分。
总之，植物耐受干旱的能力是长期自然选择的结果，通过多种生理和形态适应机制，使它们能够在缺水环境中生存和繁衍。
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