Question

Blastopore is the pore of

• A. blastocoel
• B. archenteron
• C. alimentary canal
• D. coelom

Answer 1

The correct option is B

archenteron

The correct option is B.

Explanation of correct option:

1. Gastrula is formed during the early stages of embryonic development.
2. The cavity of the gastrula is known as the ‘archenteron or primitive gut’. It is lined by endoderm.
3. The opening of archenteron is called ‘blastopore’. The blastopore plays an important role in organizing germ layers.
4. The blastopore develops into the anus in deuterostomes, whereas, it becomes the mouth in protostomes.

Explanation of incorrect option:

Option A:

Blastocoel refers to the fluid-filled cavity of the blastula. It helps in the migration of cells during the gastrulation stage.

Option C:

The alimentary canal or gastrointestinal tract is the pathway that helps in digestion and elimination of solid wastes.

Option D:

The coelom is the fluid-filled body cavity that is present in many animals. It is lined by mesoderm.

Final answer: Blastopore is the pore of the archenteron.