Amicrobe is discovered living in an extreme environment near a deep sea vent. the microorganism lacks a nucleus and peptidoglycan in its cell wall, but it does have unusual membrane lipids. this species is most likely a member of the domain

Archaea

Explanation:

Archaea are prokaryotes, which means they lack a nucleus. Many Archaea are extremophiles, organisms that live in extreme conditions, which give us another hint. But most importantly, a unique characteristic of Archaea is the presence of ether linkages in the lipids of their cytoplasmic membranes. This  distinguishes archaea from eukaryotes and most bacteria.

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