1. Genetically modified organism 2.Transgenic organism 3.Ethical biological concern. If you want to learn more about human antibody, the link below may help a lot: https://www.creativebiolabs.net/Human-Antibodies_31.htm
All of the following (corals, jellyfish, and sea anemones) have only one opening into their digestive system, except roundworms, which have more than one.
