<P> The East European Plain encompasses most of European Russia . The West Siberian Plain , which is the world 's largest , extends east from the Urals to the Yenisei River . Because the terrain and vegetation are relatively uniform in each of the natural zones , Russia presents an illusion of uniformity . Nevertheless , Russian territory contains all the major vegetation zones of the world except a tropical rain forest . </P>
the part of russia east of the ural mountains is known as
The West Siberian Plain