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The level of biological organization is composed of tissues is a organ. The smallest unit that has all of the characteristics of life is the cell.
organs
atom
sub-atomic particles
The cell.
Organ
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.
Biological organization starts at the microscopic level as it is a hierarchy of increasing complexity. each level builds on the previous levels basic unit.
The correct sequence of the levels of biological organization are organism, population, community, ecosystem, and biosphere.
The thing is, there are no levels of the biological communities. The biological community is a level in the Levels of Organization. So therefore, I don't think there is a possible answer!
Kingdom: The highest level of biological classification.
biosphere