Clones are formed through asexual reproduction, which involves a single parent and does not require fertilization or the involvement of gametes. Some examples of asexual reproduction in eukaryotes include budding, transverse fission in Paramecium, and longitudinal fission in Euglena. Gonyaulax causes red tides and secretes the toxic saxitoxin. Vegetative propagules like suckers, tubers, offsets, and bulbs are important structures in vegetative propagation. Nodes on plants are also important for vegetative propagation by giving rise to new plants.