Realms are in turn divided into biomes , a large region of land characterized mainly by the climax vegetation of the ecosystems within its boundaries.
(Realms; are; in turn) (turn; divided; into biomes) (land; characterized mainly; by the climax vegetation of the ecosystems within its boundaries)
Realms turn land
are divided characterized mainly
in turn
into biomes
by the climax vegetation of the ecosystems within its boundaries