Which of the Following Characteristics Generally Applies to Protostome Development

Question

Which of the following characteristics generally applies to protostome development?
A) radial cleavage
B) determinate cleavage
C) diploblastic embryo
D) blastopore becomes the anus
E) archenteron absent

Accepted Answer

Protostome development is generally characterized by determinate cleavage, meaning that each cell in the developing embryo has a predetermined fate.

Answer: D
 Another defining feature of protostome development is that the blastopore becomes the anus, with the mouth forming later from a secondary opening. This is in contrast to deuterostome development, where the blastopore becomes the mouth and the anus forms from a secondary opening.