This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Biological classification Pengo.svg NOTOC Caption Classifying the diversity of organic life Diagrammatic illustration of the biological classification system Classification levels Species Genus Family Order Class Phylum Kingdom Domain Life organic life About the Domains This diagram implies Domains Kingdoms Woese et al Carl Woese