Question

The opening of which of the following is known as blastopore?

• A. Gastrula
• B. Morula
• C. Blastula
• D. Neural

Hint:

Blastopore is a key feature of the gastrula stage in embryonic development, marking the beginning of body axis formation.

Answer 1

The Correct Option is A

Step 1: Understand the stages of embryonic development.
Blastopore is an opening that forms during early embryonic development, specifically in the gastrula stage.
Step 2: Review the options.
- Gastrula is the stage where the blastopore forms. This is the correct answer.
- Morula is an early stage in development where the embryo consists of a solid ball of cells, but no blastopore is formed.
- Blastula is a later stage after gastrulation, where a hollow sphere of cells forms, but the blastopore is not an opening of this stage.
- Neural refers to the stage where the neural tube forms in development but is not related to the blastopore.
Step 3: Conclude.
The blastopore is formed during the gastrula stage, making option (A) the correct answer.
Final Answer: \[ \boxed{\text{Gastrula}} \]