种子是整个植物界从低等的菌藻植物到高等的被子植物,经过亿万年进化过程的产物。种子的出现,是植物界发展过程中的一个巨大的飞跃。这是因为种子这种繁殖器官,对植物的繁衍和传播,具有特殊的优越性,在各种不同的生育条件下,能保证种子植物群落广泛分布和长期生存,并不断产生 Seeds are the product of the entire plant kingdom from the lower mycobacteria to the higher angiosperms after millions of years of evolution. The emergence of seeds is a huge leap forward in the development of plant kingdom. This is because the seed, an organ of reproduction, has the special superiority to the multiplication and propagation of plants and can ensure the widespread distribution and long-term survival of the seed plant community under a variety of different reproductive conditions,