Question

Termination of gastrulation is marked by

(a) obliteration of archenteron

(b) closure of neural tube

(c) obliteration of blastocoel

(d) closure of blastocoel

Answer 1

Correct option (c) obliteration of blastocoel

Explanation :

Termination of gastrulation is marked by obliteration of blastocoel. Transformation of the blastocyst into the gastrula with primary germ layers by rearrangement of the cells is called gastrulation. Gastrulation involves cell movements that help to attain new shape and morphology of the embryo. These cell movements are called morphogenetic movements. At the termination of gastrulation, archenteron is formed at the place of blastocoel.