1、 Origin

The origin of plants is very long. Long ago, there were single celled plants on the earth. According to the current division, that is, fungi and algae. At this time, the plant has only one cell, the structure is very simple, belongs to prokaryotic cells, and cannot absorb sunlight to synthesize nutrients through photosynthesis. Growth and life only depends on nutrients in the environment, and cannot produce nutrients alone. Then it will gradually evolve into autotrophic plants, that is, cyanobacteria. They are relatively small, but they can synthesize nutrients and release O2 like real plants

2、 Evolutionary process

The evolutionary process of plants is basically divided into bacteria and algae era, naked Jue era, fern era, gymnosperm era and angiosperm era. First of all, there are only small fungi and algae. With the change of environment, the surrounding nutrition is difficult to meet the growth, and began to evolve gradually to complex, which leads to the existence of lichen plants. Is it composed of algae and hyphae or low-grade plants. In the later stage, it gradually evolved into bryophytes. In the later stage, ferns appeared. With the increase of function, seed plants appeared