Here is the taxonomic hierarchy:
Domain
Kingdom
Subkingdom
Infrakingdom
Superphylum/Superdivision
Phylum/Division
Subphylum/Subdivision
Infraphylum/Infradivision
Superclass
Class
Subclass
Infraclass
Superorder
Order
Suborder
Infraorder
Superfamily
Family
Subfamily
Infrafamily
Genus
Species
Subspecies/Variety
Breed/Subvariety
Therefor, Breed and Subvariety are the most complex levels of biological organization.
Cells, tissues, organs, and then organ systems.
The series of terms in the sequence of biological organization from the simplest to the most complex is cell, tissues, organs, systems, and lastly the organism. This is the way living things are organized.
Population
No, because organisms are made up of organs, and, in turn, are components of ecosystems. The most inclusive biological level would probably be the entire biosphere.
the biosphere
Cells, tissues, organs, and then organ systems.
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Multicellular organisms have 5 levels of organization ranging from simplest to most complex...cells, tissues, organs, organ systems, organisms.
Species.
environment
1. Cells 2. Tissues 3. Organs 4. Organ systems 5. Organisms
cell
Biosphere.
The cell which is the basic unit of life
A cell.