A small bowl of yogurt with blueberries and granola on top. Probiotics are not necessary for human health, according to Mayo Clinic nutritionist Katherine Zeratsky. Nevertheless, they might possess many health benefits. Although research is limited, some studies suggest that probiotics may help prevent or treat a number of conditions and improve overall health and wellness. Probiotics are found in food sources as well as dietary supplements.
In mutualism, both organisms benefit. In commensalism, one benefits and the other is unaffected; in parasitism, one benefits and the other is harmed. Some of these relationships are so close that we speak of the composite of two species as one unit; for example, we speak of the composite of algae and fungi as lichens.n commensalism, one benefits and the other is unaffected; in parasitism, one benefits and the other is harmed. Some of these relationships are so close that we speak of the composite of two species as one unit; for example, we speak of the composite of algae and fungi as lichens.
role and position a species has in its environment: parasitism: symbiotic relationship in which one organism benefits at the expense of the other species: population: group of organisms of one species that interbreed and live in the same place at the same time: symbiosis: permanent, close association between two or more organisms of different species: autotroph