1. Organism: (description) an individual animal, plant, or single-celled life form.
(example) Humans, squids, mushrooms, and vascular plants
2. Population: (description) A population is all the inhabitants of a particular
place
(example) All institutionalized elderly with Alzheimer's
All people with AIDS
3. Community: (description) A community is a social unit with commonality such as norms, religion, values, customs, or identity. Communities may share a sense of place situated in a given geographical area or in virtual space through communication platforms.
(example) a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi
4. Ecosystem: (description) An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.
(example) agroecosystem, aquatic ecosystem, coral reef etc.
5. Biosphere: (description) The biosphere is the worldwide sum of all ecosystem
(example) An example of the biosphere is where live occurs on, above and below the surface of Earth.
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