A. They are autotrophic
B. They are multicellular and heterotrophic
C. They have cell walls made of cellulose
D. They are unicellular
Answer: They are multicellular and heterotrophic
Which of the following is a key feature of the kingdom Animalia?
Additional Information: Animals are multicellular organisms that cannot produce their own food and must obtain nutrition by consuming other organisms.
Subjects: Biological Classification, Biology