When we say 'simpler organisms' or 'complex organisms' what are we referring to?
When we say 'simpler organisms' or 'complex organisms' what are we
referring to?
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When we say simple or complex organisms we are talking in terms of evolutionary history of an organism. A simple organism is considered to be primitive and has simple thallus organisation. The level of complexity of metabolism is also low. On the other hand a complex organism refers to a more evolved form forming higher levels of structural and functional complexities. They are believed to have arisen from simple organisms.
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