Final answer:
The statement that is NOT true is a) "formation of the neural tube uses invagination but formation of the gut tube does not." The formation of the neural tube occurs through a process called neurulation, which involves the folding of specialized neuroectodermal tissues to form the tube. On the other hand, the formation of the gut tube involves the endoderm germ layer and is not associated with invagination.
Step-by-step explanation:
The statement that is NOT true is a) "formation of the neural tube uses invagination but formation of the gut tube does not."
The formation of the neural tube occurs through a process called neurulation, which involves the folding of specialized neuroectodermal tissues to form the tube. On the other hand, the formation of the gut tube involves the endoderm germ layer and is not associated with invagination.
Therefore, statement a) is not true as the formation of both the neural tube and the gut tube involves different processes.