Answer:
C.)first slide: neurula: second slide: morula
Explanation:
During the neurula stage, we can see when scanning that the dorsal neural tube closes from posterior to anterior. The process of neurulation brings changes in the shape forming the neural tube. It is formed by primary neurulation by the overlying ectoderm proliferation and then the invagination. There is a secondary neurulation where the neural tube arises from a cord of cells, these sink in the embryo and form the tube.
The morula is similar to a golf ball, it means it has a spherical shape. It has 16 totipotent cells, it is a mass of the embryo. The cells have rapidly mitotically divided to produce the solid mass.
