Autoimmune Disease Genetics. 1  1Division of Rheumatology and Department of Immunology, Mayo Clinic, 200 1st Street SW, Guggenheim Building 3-42, Rochester, MN 55905, USA. 2  2Laboratory of Molecular Medicine and Human Genetics, Department of Medicine, University of Crete, Heraklion, Greece.
Sunlight, soil, water, and pollution, for example, are all important abiotic factors of an environment that affect life. The biotic environment, on the other hand, is composed of all the living organisms in an ecosystem, and includes factors such as disease, predators, prey, and human activity.
One example of commensalism in the tundra biome can be seen between  the caribou or reindeer and the arctic fox. good example of mutualism in the grassland biome is that of a bird eating ticks off a buffalo, where the bird will be fed, and the buffalo will be parasite free. 10 people found this useful.