A) The most extensive ecosystem unit which is convenient to designate.
B) The vegetation community developed at the last stage of biotic succession.
C) Transition area between two biomes.
D) None of the above.
Correct Answer: C
Solution :
[c] An ecotone is a transition area between two biomes. It is where two communities meet and integrate. It may be narrow or wide, and it may be local (the zone between a field and forest) or regional (the transition between forest arid grassland ecosystems). The most extensive ecosystem unit which is convenient to designate is called biome. The vegetation community developed at the last stage of biotic succession is called climax community.
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