Protozoa (kingdom Protoctista) A phylum (division) of eukaryotic, single-celled micro-organisms which show a wide variety of forms. The phylum includes some plant-like forms and animal species that are free-living, commensal, mutualistic, and parasitic, and some important disease-causing organisms.
Lake Baikal in Siberia, Russia (Asia), is the world's deepest fresh water lake at 1,638 metres deep. It is 636 km long and is the world's sixth largest lake and 1,181 metr â¦ es of it is below sea level. It contains 20% of the world's fresh water which is so clear that divers suffer from vertigo.
Baikal is a rift lake in the south of Siberia which contains roughly 20% of the world's unfrozen surface freshwater â the greatest in the world by volume. It is 1,642 meters deep and among the clearest of all lakes. At 25 million years old, it is also thought to be the world's oldest lake.