靠风来传播
Rely on the wind to spread
借助风力来传播的种子,通常质量较轻能悬浮在空气中,并随风而运动到各处。有些植物的种子还长出一些适合于借助风力飞翔的特殊构造。如棉、柳种子上的细绒毛;蒲公英果实上的伞状冠毛;松树、槭树、榆树等植物种子的一部分果皮和种皮展成翅状;酸浆属的果实有薄膜状的气囊等等。春天,柳絮四处飞扬。抓一团柳絮仔细观察,会发现里面有些小颗粒,那就是柳树的种子。柳树就是靠柳絮的飞扬,把种子传播到四面八方的。
Seeds that are spread by wind, usually with a lighter weight, are suspended in the air and move to a place with the wind. Some plants have some special structures that are suitable for the use of wind power. Such as cotton, willow seed fuzz; dandelion fruit umbrella crested, pine, maple, elm seed part of pericarp and testa exhibition into winged; Physalis fruit a film like airbag. The spring catkins flying around. Catch a catkins look carefully, will find that there are some small particles, that is the seeds of willow. The willow catkins flying by, the seeds spread from all sides.
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