Question Detail
Question
In the phylogenetic tree, which clade is characterized by animals that possess a 'possess body cavity' label?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The diagram shows that the branch for 'possess body cavity' leads to the Protostomia and Deuterostomia clades. Acoelomates, by definition, lack one.
Hint
These are the two major divisions of the triploblastic coelomates.