Concept of levels of Organisation :
There are many levels of a organisation of organisms in the nature. It is w ell known that the body of every animal is made up of cells that contains protoplasm and genes. The group of cells is called as tissue, the tissues form organ, the organs together form organ system and the various organ systems form an individual. The organism is a unit of ecology.
A group of animals of a specific species is called as population where as the groups of different species at a times in a specific area/region is called as community. The continuously occurring various activities between the community and the surrounding abiotic factors (environment) constitute an ecosystem. The sum of all the ecosystems form the biggest organisation, the biosphere or ecosphere i.e. the lithosphere, hydrosphere and atmosphere together constitute the Biosphere.
There is hierarchical arrangement from higher to lower sequence of many organisms levels. Every level interacts with its physical environment (Energy and Substances) to form a specific functional system. No specific or distinct borderline can be established between the two organisation levels just like between two color spectrum’s. The various levels are directly or indirectly interdependent.
