Explain the ecological hierarchy.
Ecological hierarchy: It is a series of graded ecological categories. Characteristics of ecological hierarchy: A biological unit at each level has a specific structure and function. In this hierarchy, smaller biological units coordinate to form the next higher level of organisation. Only the organisms show free existence. Organisms cannot live in isolation. At each level, different units show interdependence. At each level, the unit shows interaction with the physical environment (energy and matter). The biological units are successfully adapted to their environment.
