Question Detail
Question
Which structure forms as a result of gastrulation and is responsible for establishing body axes?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The primitive streak is a groove that forms on the surface of the blastula/epiblast during gastrulation; it defines the anterior-posterior axis and is the site where cells migrate inward to form new layers.
Hint
It's a 'streak' that establishes the head-to-tail plan.