The most primitive plants have formed such rich and diverse plants on the earth with continuous genetic, mutation, and evolution with the change of geology and time.
According to the perfectness, morphological structure, lifestyle, and kinship of the plant structure, plants are divided into two categories: high plants and low plants.Each category can be divided into several small categories.
Low plants are a group of plants with earlier origin and simple structure. The main characteristics are aquatic or wet, and no root, stems, and leaves are differentiated.No embryos are not formed, and it is directly germinated into a new plant.Low -class plants can be divided into algae, bacteria and ground clothes.
Most of the high plants.Their plants often have different roots, stems, and leaves (exceptions of moss plants), and female reproductive organs are composed of multiple cells.Fertilization eggs form embryos and grow into plants.