Which of the following statements accurately describes animals?
a. all animals are multicellular, all are heterotrophic, and all lack cell walls.
b. all animals are multicellular, some are heterotrophic, and some lack cell walls.
c. some animals are multicellular, all are heterotrophic, and all lack cell walls
d. some animals are multicellular, some are heterotrophic, and some lack cell walls.
Answer: a