Answer the following

In which kingdom do you include multicellular, primitive, heterotrophic eukaryotes?

The characteristic features of Kingdom Animalia include

(i) Multicellulared organisms

(ii) Eukaryotic cells with a well defined nucleus

Kingdom Animalia includes heterotrophic organisms. They cannot synthesize their own food, hence obtain food directly (herbivores) or indirectly (carnivores) from plants.

Some primitive organisms like Euglena are also included under kingdom Animalia.

Hence, according to the above stated facts, the suitable Kingdom is Kingdom Animalia