English: The ancestors of bacteria were unicellular microorganisms that were the first forms of life to appear on Earth, about 4 billion years ago.
Ho: Bacteria koaḱ Ancestor ko do, 4 Billion sirma maaṅ Ote chetan oolt́ ean ayarùtar Jivt́form (Life form) tan Unicellular Manjivt́aḱ (Microorganism) ko.