Define symbiosis. What types of interactions could be considered symbioses?
What will be an ideal response?
Symbiosis is the intimate association of two unrelated species. The term symbiosis was first widely used in the mid 1800s by a scientist named de Bary to describe the association between fungi and algae in lichens. De Bary explicitly treated parasitic interactions as symbioses, but he excluded those that were only of short duration. According to de Bary, both the Schistosoma and Aphid-buchnera examples would be considered symbioses but the insect-plant interaction would not.
Different people have different definitions of symbioses. Many, for example, particularly parasitologists, don't consider parasitic interactions to be symbioses. Others argue that any type of interaction with a significant outcome, no matter how short, should be considered a symbiosis. This would make the insect-plant association a symbiosis. One of the more commonly held beliefs about symbioses is that they are associations in which all organisms benefit.
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Fill in the blank(s) with the appropriate word(s).
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