Q.
Choose the correct option regarding the process in which morphogenetic movements take place and cells occupy their definite position to form three germ layers.
Gastrulation is the process by which a blastula converts into gastrula. During gastrulation, morphogenetic movements occur and a three-layered embryo made of ectoderm, mesoderm and endoderm enclosing a new cavity called 'archenteron' is formed.
Neurulation is the embryonic stage that forms neurula. In this stage, the neural plate gets transformed into the neural tube.
Notogenesis is the developmental process to form notochord by the epiblasts. The notochord plays a vital role in the development of the nervous system and later, it forms the major part of the vertebral column in the vertebrates.
Morphallaxis is the process of regeneration of lost or dead tissue.