Which of the Following is Not Formed by the Endoderm

Question

Which of the following is not formed by the endoderm?
A) lining of the lungs
B) nasal bones
C) thymus gland
D) tonsils

Accepted Answer

The endoderm does not form bones, including the nasal bones which are formed from the mesoderm. The lining of the lungs (A), thymus gland (C), and tonsils (D) are all formed from the endoderm.