Orange Standards Of Learning (SOL) Practice Exam

Mutualism is a relationship in which both participants gain a benefit, improving each one’s ability to survive or reproduce. In this kind of association, each species provides something the other needs. For example, flowering plants offer nectar and pollen to pollinators like bees, and bees help plants by transferring pollen between flowers. Another common example is the relationship between gut bacteria and their animal host: bacteria get a habitat and nutrients, while the host benefits from aided digestion and nutrient synthesis. Because both sides gain, mutualism fits this definition perfectly. If only one species benefits and the other is harmed, that’s parasitism. If one species benefits while the other is unaffected, that’s commensalism. If neither benefits, that’s a neutral or non-beneficial interaction.