Question

Blastopore is

(a) opening of neural tube

(b) opening of gastrocoel

(c) future anterior end of embryo

(d) found in blastula.

Answer 1

it will b. A blastopore is a mouth like opening of the archenteron on the surface of an embryo in the gastrula stage. In many animals the blastopore becomes the anus,although in some it closes up at the end of gastrulation and may appear again at or near the same site.blastopore is formed by an inward movement of the endoderm and mesoderm cells of the archenteron during gastrulation. sometimes this movement is incomplete,so that an open pore does not develope;this explains the primivite streak of a bird or mammal embryo during gastrulation.then it can be say as a 'virtual blastopore'.