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there are three of life: bacteria, archaea, and eukarya. bacteria and archaea are which means they do not have a bacteria and archaea are also which means they are made up of only one cell. eukarya are meaning they have a nucleus. eukarya can be single-celled or can be like plants, animals, and humans. within the domains, there are smaller categories called organisms are also categorized by how they get nutrients. for instance, make their own food, and have to consume other organisms for nutrients

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Depending on the sort of cell an organism uses, all life can be categorized into three categories: Cells of bacteria lack a nucleus. Cells belonging to the archaea phylum lack a nucleus and have a distinct cell wall from those of bacteria. A nucleus is present in eukaryotic cells.

What feature unites all three spheres of existence?

The evolution of cellular change is traced by the domains of life. A Last Universal Common Ancestor connects them all. In general, archaea and bacteria are related because both are small cells with limited internal organization, lack nuclei, and have RNA rather than DNA.

What features are shared by bacteria, archaea, and eukaryotes?

Prokaryotes, which are single-celled organisms without nuclei, contain both bacteria and archaea, which includes us in the phylum Eukarya.

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