Plant phyla are major groups that classify plants based on shared characteristics and evolutionary relationships. There are several key phyla, including Bryophyta (mosses), Pteridophyta (ferns), and Angiosperms (flowering plants). Each phylum has unique features, such as reproductive methods and structural adaptations, that help them thrive in different environments. The classification of plants into phyla helps scientists understand biodiversity and the evolutionary history of plants. For example, Gymnosperms, which include conifers, produce seeds that are not enclosed in fruit, while Angiosperms have seeds enclosed within fruits. This system of classification aids in studying plant ecology and conservation.