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.
It is 5,314 feet deep (1,637 meters) and it's bottom is at 4,215 feet (1,285 meters) below sea level. Lake Baikal is also the world's largest freshwater lake in terms of volume. It is difficult to comprehend how a lake in the middle of a continent could have a bottom that is 4,215 feet below sea level.