What are the 12 levels of biological organization?

All 12 with their definitions:

BiosphereInteraction between organisms and their environment, which includes both biotic and abiotic factors.

CommunityAll organisms in a particular area.

PopulationAll individuals of a particular species in a particular area.

OrganismAn individual.

Organ systemA group of organs that work together to perform a certain task.

OrganTissues that work in unison to carry out a specific set of functions.

TissueA group of cells with the same structure and function.

CellThe basic biological unit of life in all organisms. The smallest autonomous self-replicating unit.

OrganelleAn organized differentiated structure with a cell that performs a specific function.

MoleculeTwo or more atoms combined.