Question | Most zoologists believe that nematode psedocoelm: |
1. | Is lined by ectoderm and endoderm but the lining lacks mesoderm. |
2. | Becomes the intestine lumen as the nematode matures. |
3. | Form by secondary invagination of the gastercoel. |
4. | Develops from the embryonic blastocoel. |
The correct answer is (4) |