SSC MTS EXAM

Detailed explanation-1: -For multicellular organisms, the boundary is the collective of all the (generally specialized) cells on the organism’s perimeter, its dermal tissues. For most of the organisms studied here the dermal cells have a cell wall and also a specialized coating on the outside.

Detailed explanation-2: -An ecotone is a transition area between two biological communities, 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 and grassland ecosystems).