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.
The World's Deepest Lake. Lake Baikal in southern Russia is the world's deepest lake. It is an estimated 5,387 feet deep (1,642 meters), and its bottom is approximately 3,893 feet (1,187 meters) below sea level. Lake Baikal is also the world's largest freshwater lake in terms of volume.