Comment on Commensalism by Kerry. I am in my fourth year of university and i am searching for an interesting topic for a research paper. The topic is about mutualistic and parasitic relationship between three different kingdoms. What I am having trouble with is finding information on interesting organisms that show these relationships. So essentially any ideas would be great.
Most animals have a huge skin and gut fauna of protozoa and bacteria.
In reality I would think every animal would fit your description. Concerning the opisthobranch examples described in the Forum. I don't think they fit your specifications, although there are interesting thoughts that plant plastids are in fact obligate parasite or commensal protozoa in plants. Comment on Parasite and Mutualistic relationships by Tammy Pearson. There are pictures at the top and answers to some other questions below.