[Solved] A heater is rated at 1200 watts for a 120-volt source. The current drawn by the heater is 10 amperes. 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. Club Mosses: Ancient plants belonging to the division Lycophyta that resemble true mosses superficially but have vascular tissue and reproduce by spores. Whisk Ferns: Fern relatives lacking true roots and leaves; characterized by dichotomous branching.