A dynamic introduction to the life cycle of this unique plant! A good prelude to other investigations. This exercise provides a clear illustration of organ and tissue differentiation in the developmentally simple gametophytes. Unlike many higher plants, gametophyte sexual development, swimming sperm, fertilization, and embryo development are directly visible using a stereomicroscope and simple culture equipment. Includes materials for 30 students. Experiment time is 21 days with optional extended observations over 3 months. With instructions. Reusable with Replacement Set.