All single-celled eukaryotes are placed under (Blank Number 1) ____, but the boundaries of this kingdom are not well defined. Members of this kingdom are primarily (Blank Number 2)____. This kingdom forms a link with the others dealing with plants, animals, and fungi. Being eukaryotes, their cell body contains a well-defined nucleus and other membrane-bound organelles. Some have flagella or cilia. They reproduce ____(Blank Number 3) by a process involving cell fusion and zygote formation.