Which kingdom is characterized by prokaryotic organisms?

The kingdom that is characterized by prokaryotic organisms is Monera. This kingdom includes bacteria and archaea, which are single-celled organisms that lack a defined nucleus and other membrane-bound organelles, making them prokaryotes. Prokaryotic organisms have a simpler cell structure compared to eukaryotic organisms, which are found in the other kingdoms, such as Animalia, Fungi, and Protista.

Monera is distinct in that its members are primarily unicellular and have diverse metabolic pathways, allowing them to inhabit various environments. Some prokaryotes are autotrophic, meaning they can produce their own food, while others are heterotrophic, relying on organic compounds from their environment. This versatility contributes to the ecological significance of Monera as decomposers and contributors to nutrient cycles.

In contrast, the other options represent kingdoms that are primarily composed of eukaryotic organisms. Animalia includes multicellular organisms that have complex cell structures, and Fungi consists of multicellular organisms that also have defined nuclei. Protista contains both unicellular and multicellular organisms but is mostly made up of eukaryotes as well. Therefore, only Monera is the correct choice when identifying a kingdom solely made up of prok