A) blastula and is opening of archenteror
B) blastula and is opening of blastocoel
C) gastrula and is opening of archenteroc
D) gastrula and is opening of blastocoels
Correct Answer: C
Solution :
Gastrula stage is characterised by ectoderm, endoderm, archenteron and blastopore. A cavity is formed during emboly with the blastopore at its opening. This cavity is known as archenteron or gastrocoel. The size and formation of blastopore and archenteron depends upon the presence and amount of yolk particles. As the amount of yolk increases it tends to fill both-the archenteron and blastopore.
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