一、高等植物的世代交替高等植物一个完整的生命周期是从种子到下一代新的种子。这一过程可分成两个阶段:无性世代和有性世代。无性世代是从受精卵开始,发育成种子(包括胚和胚乳),由种子长成植株。这一世代主要是细胞数目的增加、植株体积的增长和组织的分化。植株分化雌雄性器官,产生雄配子(精核),雌配子(卵),这就是有性世代。雌雄配子结合 First, higher plants alternating generations Higher plants a complete life cycle from the seed to the next generation of new seeds. This process can be divided into two stages: asexual and sexual. Asexual generation begins with fertilized eggs and develops into seeds (including embryos and endosperm) that grow from seed to plant. This generation is mainly an increase in the number of cells, the growth of plant volume and tissue differentiation. Plants differentiate between male and female organs, produce male gametes (sperm nuclei), female gametes (eggs), which is the sexual generation. Male and female gametes combined