Plants diversity
The plants are classified into four main groups. The plants without vascular tissues, i.e. no roots, stems and leaves, are mosses, hornworts and liverworts. The plants that have vascular tissues but seedless are ferns. For the vascular plants having seeds, the non-flowering plants are conifers, while the flowering plants are angiosperms. Some plants have developed special features for adapting extreme environments. Xerophytes survive in dryness, as they have widespread roots, barrel-sharped stems and needle-shaped leaves. Hydrophytes possess broad leaves for floating to maximize sunlight absorption…