A group of similar organisms, able to interbreed and produce offspring.

A group of organisms of the same species which live in the same habitat.

The population of all organisms from different species living in the same habitat whilst interacting with each other.

A few communities that live together in habitat and interact with each other including non-living components.

The role of an organism in an ecosystem includes its behaviour and interaction with biotic & abiotic components in the habitat.

Refer to all organisms in an ecosystem that interacts with other organisms (Producers, consumers & decomposers).

All the non-living elements like pH value, temperature, light intensity, topography, microclimate & air humidity that affects organisms.

Photoautotrophic & chemoautotrophic

Saprotrophic, holozoic & parasitic