Ecotype Genetically distinct adapted population to a particular habitat of species in different geographical area Ecophene Phenotypic variants of a single genotypes in a particular area or habitat Phenotypic Plasticity Shift in an organism body physiology behavior. When shifted to different environment condition $e.g.,$ When a man living an plane are a went to hill area or mountain. Three extra R.B.C cells are produced seems to help transport available oxygen around the body is called phenotypic plasticity