Final answer:
Organisms in the Animalia kingdom have cells that lack a cell wall.
Explanation:
The kingdom in which all organisms have cells that lack a cell wall is the Animalia kingdom. Organisms in the Animalia kingdom have cells that do not possess a cell wall, unlike organisms in the Fungi and Plantae kingdoms. Examples of organisms in the Animalia kingdom include humans, lions, and birds.
Learn more about cell structure and classification here:
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