If you are told that the digestive tract of the animal you are studying developed an anus before a mouth, you may be looking at:
A) an arthropod.
B) an animal in which the embryo undergoes radial cleavage.
C) an animal in which the embryo undergoes indeterminate cleavage.
D) an animal in which the embryo undergoes enterocoely.
E) an animal in which the embryo undergoes radial, indeterminate cleavage and enterocoely.

Question

Quizplus · Accepted Answer

The anus develops from the blastopore in animals that undergo enterocoely. Arthropods are animals that undergo enterocoely.

If You Are Told That the Digestive Tract of the Animal