What is the primary defining characteristic that groups organisms into the Kingdom Animalia, which includes the Willow Flycatcher?
Answer
Being multicellular, eukaryotic organisms that are heterotrophic, obtaining nutrition by consuming other organisms.
The Kingdom Animalia is broadly defined by several fundamental biological characteristics. Organisms in this kingdom are multicellular and composed of eukaryotic cells, meaning their cells possess a nucleus and membrane-bound organelles. Crucially, they are heterotrophic, which necessitates obtaining necessary nutrition by consuming other organisms, as opposed to producing their own energy through photosynthesis like plants. Furthermore, animal cells characteristically lack cell walls, distinguishing Animalia from Kingdoms like Plantae (which have cellulose walls) or Fungi (which have chitin walls).
Related Questions
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