Question

What is the main evolutionary innovation presented by nematodes? What is the advantage of that innovation?

Answer 1

As we all knows about symbiosis which is the source of evolutionary innovation. Some main innovation in animal evolution are- Evolution in symmetry, evolution of specific tissue, evolution in body cavity, Evolution in pattern of embryonic development and evolution in segmentation. Nematodes are the plant and animal parasite. Which involve sexual reproduction with sexual diamorphism. Complete digestive system is the main evolutionary innovation in nematodes with mouth and anus. The ingestion and the defecation which generally occurs in digestive tube, the complete digestive system of nematodes which enclose advantage of ingestion of new food although the residual of already eaten food are also inside the body and not so far excreted.