A nonliving condition or thing, as climate or habitat, that influences or affects an ecosystem and the organisms in it.
A living thing, as an animal or a plant, that influences or affects an ecosystem.
A system, or a interconnected group of elements, formed by the interaction of a community of organisms with their environment.
The natural habitat of an organism; place that is natural for the life and growth of an organism.
A form of life composed of mutually independent parts that maintain various vital processes.
The total amount of people inhabiting a country, city, or any area or district.
A social group or any size whose members reaside in a specific locality, share government, and often have a common cultural and historical heritage.
The assignment of organisms to groups within a system of categories distinguished bystructure, origin, etc. The usual series of catelgories is phylum (or, especially in botany,division), class, order, family, genus, species, andvariety.
The science or technique of classification.