Context: Animals have several characteristics that set them apart from other living things. Animals are eukaryotic and multicellular, which separates them from bacteria and most protists. They are heterotrophic, generally digesting food in an internal chamber, which separates them from plants and algae. They are also distinguished from plants, algae, and fungi by lacking rigid cell walls. All animals are motile, if only at certain life stages. In most animals, embryos pass through a blastula stage, which is a characteristic exclusive to animals.

Question: What sets animals apart from bacteria  and most protists?
Answer: Animals are eukaryotic and multicellular

Question: What are organisms called that digest food in an internal chamber?
Answer: heterotrophic

Question: What is another way in which animals are distinguished from plants and algae?
Answer: lacking rigid cell walls

Question: The blastula stage is a characteristic exclusive to what organism?
Answer: animals