What developmental event was key to the evolution of the chordates,by forming the notochord and dorsal nerve cord?
A)morphogenesis
B)organogenesis
C)gastrulation
D)neural crest formation
E)neurulation

Question

Quizplus · Accepted Answer

Neurulation is the developmental event that forms the notochord and dorsal nerve cord, which are defining characteristics of the chordates. During neurulation, a group of cells in the embryo called the neural plate folds inwards to form the neural tube, which eventually gives rise to the brain and spinal cord. The notochord forms just beneath the neural tube, providing structural support and signaling molecules that help guide the development of nearby tissues. Therefore, neurulation is a critical developmental event that marks the emergence of chordates from their invertebrate ancestors.

What Developmental Event Was Key to the Evolution of the Chordates,by