Final answer:
Treeline is not a biome but a border where trees can grow, and it is not one of the four types of terrestrial ecosystems which include grasslands, deserts, tundra, and forests (taiga). option c is correct.
Step-by-step explanation:
The terrestrial ecosystem type that is not one of the four conventional classifications is C. Treeline. The main types of terrestrial biomes include grasslands, forests (which may be tropical, temperate, or boreal, also known as taiga), deserts, and tundra. Grasslands are dominated by grasses, deserts have sparse rainfall and vegetation, tundra is known for its extremely cold climate and minimal plant life, and forests vary by latitude with different types of dominant tree species. Treeline is not a biome but rather refers to the edge of the habitat at which trees are capable of growing.
When examining statements about biomes, the false statement is "Boreal forests are dominated by deciduous trees." Boreal forests, or taiga, are in fact dominated by coniferous trees such as pines, spruces, and firs. Other statements such as chaparral being dominated by shrubs, grasses dominating savannas and temperate grasslands, and lichens being common in the arctic tundra are all true.