Question

on what basis the seeds are classified from kingdom to species

Answer 1

Taxonomists, at least in the traditional Linnaeus method for classifying plants, separate the plantae kingdom into four major groups, or divisions, including: mosses and liverworts, which have no proper root systems; ferns, which have proper roots and produce spores (specialized reproductive cells rather than conventional seeds); coniferous trees, which have root systems and needle-shaped leaves and cones; and flowering plants, which have root systems and flowers that produce seeds. The dominant division in many biomes (that is, biotic communities, for instance, our deserts), with a quarter of a million species, is that of the flowering plants.