First, start.
It was a sunny day and the air was particularly fresh. I accidentally found a small seed on the grass beside the road. It is an oval seed with a bright green lace in brown. "seeds?" I stepped it into the soft soil. That night, it began to rain lightly.
Second, the middle
1, I don't know how many days later, when I passed there again, "God, it's incredible!" I cried in surprise, because I was surprised to find that the seed I stepped on actually had a green seedling.
2. "Could it be grass?" I tore the soil under the bud and uprooted it. Sure enough, it was the same seed: an oval seed with a bright green color in brown, but a bud appeared on it.
I threw the seedlings on the road and left. After a long time, one afternoon, I found a small seedling emerging from the cement crack on the roadside, much like the one I pulled out and threw away.
I squatted down to observe carefully. The saplings are more than ten centimeters high, but the roots of the saplings are sticking out with the cracks in the concrete floor, and several oval emerald leaves are covered with a thin layer of dust.
Third, the end.
1. I didn't expect an ordinary seed to have such tenacious vitality. What a coincidence to think about it. When I stepped into the soil, it grew as fast as a duck to water.
2. When I threw it on the side of the road, it didn't get crushed to death, but thrived in the crack of cement-this is really a miracle of life!
Expanding knowledge-seeds
1, a unique propagule of seeds, gymnosperms and angiosperms, formed by ovule pollination and fertilization. Seeds are generally composed of seed coat, embryo and endosperm, and some mature seeds only have seed coat and embryo.
2. The formation of seeds makes the young sporozoite ovule protected by the mother, and get adequate nutrition like a mammalian fetus. Seeds also have many structures that spread or resist harsh conditions, creating good conditions for the continuation of plant races.
3. Therefore, seed plants can replace ferns in the process of plant system development. These are plant seeds, not productive seeds. Productive seeds include not only previous plant seeds, but also organs and artificial seeds that plants can use for reproduction.