All organisms are made of cells
all existing cells are produced by other living cells
the cell is the most basic unit of life
Phylum: Chordata
Class: Aves
Order: Strigiformes
Family: Strigidae
Genus: Bubo
Species: B. scandiacus
from species down we have:
species
population
organism
organ system
organ
tissue
cell
organelle
macromolecule
molecule
atom
elementary particle
I hope this helps you.
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