Streptococcus is a bacteria which is included under kingdom monera. Monerans have prokaryotic cell organisation in which membrane bound organelles like Mitochondria, E.R., Golgi bodies, etc. are absent. All the other three /.c\, Saccharomyces (a fungus) Chlamydomonas (an algae) and Plasmodium (a protozoan protist) are eukaryotes containing true membrane bound organelles.