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single leaf plant, especially the conical sleeve outside the germ of the benton plant, is a crucible structure. The germ crucible is the first leaf
plant and has the effect of protecting the younger leaves and growth cones in the germ. When the seed germinates, the germ first wears out of the ground, protecting the germ from damage when it is unearthed, and then breaks through the germ. The tip of the germ contains plant growth hormone, which is of great significance to the unearthing of seedlings, and contains leafy greens, which can be photo-cooperative after unearthing, and plays an important role in the independent life of seedlings.