(a) Plants with well-differentiated reproductive tissues that ultimately make seeds are called phanerogams.
(b) Symbiosis is a permanent, mutually dependent relationship between two orgainsms in which both get benefitted. e.g., Association between some fungal species with blue-green algae (or cyanobacteria). These symbiotic life forms are called lichens.
(c) The Binomial Nomenclature is made-up of two words - a generic name and a specific name.