In Examining an Unknown Animal Species During Its Embryonic Development

Multiple Choice

In examining an unknown animal species during its embryonic development, how can you be sure what you are looking at is a protostome and not a deuterostome?

A) There is evidence of cephalization.
B) There is a well-developed coelom.
C) The animal is triploblastic.
D) The animal is clearly bilaterally symmetrical.
E) The mouth develops first, and the anus develops later.