Invagination in the sea urchin blastula
A) forms the neural tube.
B) involves contractile filopodia extending from the endoderm cells.
C) creates a blastopore that becomes the mouth.
D) forms the archenteron.
E) occurs just prior to the blastula stage.

Question

Quizplus · Accepted Answer

Invagination in the sea urchin blastula forms the archenteron, which is the primitive gut of the developing embryo.

Invagination in the Sea Urchin Blastula