Which outcome represents the highest level of symbiotic integration between partners?

Answer

Host Domination, where the symbiont becomes an organelle.

Host Domination, where the symbiont loses all independence and becomes integrated as a permanent tissue or organelle (as seen in endosymbiosis), represents the highest level of integration achieved through extensive genetic reorganization.

Which outcome represents the highest level of symbiotic integration between partners?
biologyevolutioninteractioncoevolutionsymbiosis