which of the following is not an example of symbiosis?

1. lichen
2. mycorrhiza
3. root nodules
4. epiphytes

An epiphyte is a plant that grows non-parasitically upon another plant (such as a tree), and derives its moisture and nutrients from the air, rain, and sometimes from debris accumulating around it instead of the structure it is fastened to. An epiphytic organism that is not a plant is not called an epiphyte. It is not a symbiotic relationship.