試題詳解

21. Which of the following correctly identify which organs develop from different embryonic tissue layers in a frog?

| Endoderm | Mesoderm | Ectoderm |
| :---------- | :--------- | :---------- |
|
(A) Brain | Heart | Epidermis |
|
(B) Liver | Heart | Brain |
|
(C) Notochord | Liver | Eye lens |
|
(D) Liver | Nerves | Muscles |