What characteristic defines *Xema sabini*'s membership in Kingdom Animalia?
Answer
It is a multicellular, eukaryotic organism that must consume other organisms for energy.
Placement within Kingdom Animalia signifies that *Xema sabini* meets specific criteria fundamental to animal life. These criteria include being multicellular, meaning it is composed of many specialized cells organized into tissues and organs. Furthermore, it is eukaryotic, possessing complex cells with membrane-bound nuclei and organelles. Most critically for Animalia, it is heterotrophic, meaning it cannot produce its own sustenance internally (like plants do via photosynthesis) and must derive energy and carbon by consuming other organisms.

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Xeme Facts: Sabine's Gull (Xema) 𓅰 Animal Fact Files - YouTube
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