Which kingdom is characterized by multicellular, heterotrophic, eukaryotic organisms?

The kingdom characterized by multicellular, heterotrophic, eukaryotic organisms is Animalia. Organisms in this kingdom are primarily distinguished by their ability to consume organic material for energy, a trait known as heterotrophy. These organisms consist of multiple cells and exhibit a high level of complexity, featuring specialized tissues and organs that enable diverse forms of movement and interaction with their environment.

Members of the Animalia kingdom do not have cell walls, which is a key distinction from organisms in the Fungi kingdom that, while also heterotrophic, primarily obtain nutrients through absorption and possess cell walls made of chitin. The Plantae kingdom includes multicellular eukaryotes that are primarily autotrophic, meaning they produce their own food through photosynthesis, which further separates them from Animalia. The Protista kingdom contains a varied group of mostly unicellular or simple multicellular organisms, and while some are heterotrophic, it does not exclusively encompass the multicellular eukaryotic organisms we find in Animalia.

Understanding these distinctions helps clarify the classification of life forms and underscores the defining traits of each kingdom.