Question Detail
Question
Which of the following is not correct? a. The ectoderm forms the outer layer b. The endoderm lines the digestive tract c. The mesoderm partly fills the space between the endoderm and ectoderm d. Each germ layer contributes to each of the structures in the adult animal
Correct Answer
Option D is the correct answer.
Detailed Explanation
This statement is incorrect. While each germ layer gives rise to a specific set of tissues and organs, they do not each contribute to every structure. For example, the ectoderm forms the skin and nervous system, but not the lining of the gut (endoderm) or muscles (mesoderm). They have distinct fates.
Hint
Each layer has its own 'to-do list' of structures to form.