The Following Questions Are Based on the Description Below

Multiple Choice

The following questions are based on the description below.
A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves between larger, underlying cells (spiral cleavage) .
-What is characteristic of all ecdysozoans?

A) the deuterostome condition
B) some kind of exoskeleton, or hard outer covering
C) a pseudocoelom
D) agile, speedy, and powerful locomotion
E) the diploblastic condition