[Solved] Which one of the following equations correctly represents positron decay of ? Hornworts: A group of non-vascular plants belonging to the phylum Anthocerotophyta, known for their horn-like sporophytes. Liverworts: Simple plants that are non-vascular, meaning they do not have specialized tissues for water and nutrient transport, part of the bryophytes group. Gymnosperms: A group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes, characterized by unenclosed or "naked" seeds. Microphylls: Small, often single-veined leaves found on some plants, particularly those belonging to the lycophytes group.