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.
By Phil Plait. In the extreme northeast region of Russia is the Kamchatka Peninsula. Familiar to people who play the board game Risk, Kamchatka is a huge mass of land sticking out into the north Pacific, and sitting on the peninsula is a cluster of volcanoes, some of them among the most active on the planet.