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.
Lake Superior between Michigan and Ontario is the freshwater lake with the largest surface area 82,360 km2 (31,800 square miles). Lake Baikal, located in Siberia, Russia, has a surface area of only 31,727 km2 (12,250 square miles) but it is the lake with the largest water volume in the world, holding about 20% of the world's total fresh water. At 1,620 meters, nearly a mile deep, Lake Baikal is also without doubt the world's deepest lake.