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)You see a well-developed coelom.
C)The animal is triploblastic.
D)The animal is clearly bilaterally symmetrical.
E)You see a mouth,but not an anus.

Question

Quizplus · Accepted Answer

The presence of a mouth but not an anus is a distinctive feature of protostomes, whereas deuterostomes have an anus that forms before the mouth during embryonic development.

In Examining an Unknown Animal Species During Its Embryonic Development,how