Which of the following is NOT a kingdom in the Domain Eukarya?

The classification of living organisms is organized into domains and kingdoms, and within the Domain Eukarya, there are several kingdoms, including Animalia, Plantae, and Fungi. Each of these kingdoms includes organisms that share complex cellular structures with membrane-bound organelles and a defined nucleus.

Kingdom Monera, on the other hand, is categorized under the Domain Prokarya, which encompasses simpler organisms such as bacteria and archaea. These organisms do not possess a defined nucleus or membrane-bound organelles, distinguishing them significantly from eukaryotic organisms. Thus, Kingdom Monera is not part of the Domain Eukarya, making it the correct answer for identifying which option does not belong to that domain.

The other kingdoms listed—Animalia, Plantae, and Fungi—are all well established within the Domain Eukarya, as they are made up of more complex organisms that exhibit advanced cellular organization.