Three clades

-esther bond in cell membranes

Species: E. Coli

Presence of peptidoglycan in cell wall

DNA as a genetic storage

-Ether bonds in cell membrane

Species: American Black Bear

Presence of histones

DNA as genetic storage

-Presence of membrane-bound nucleus

Species: Methanobacter smithii

Presence of membrane bound organelles

ester bonds in cell membranes

SNA as genetic storage

Presence of histone