Mycorrhiza exhibits the phenomenon of:

Explanation

Let's explain each option individually: a) Parasitism: Parasitism is a symbiotic relationship between two organisms where one organism (the parasite) benefits at the expense of the other organism (the host). The parasite derives nutrients or resources from the host, often causing harm or negative effects on the host's health. This relationship is not exhibited by mycorrhiza. b) Symbiosis: This option is correct. Mycorrhiza exhibits symbiosis. Symbiosis is a close and long-term interaction between two different species, where at least one of the species benefits from the relationship. In the case of mycorrhiza, it is a mutualistic symbiosis between certain fungi and the roots of most higher plants (vascular plants). The fungal partner (mycorrhizal fungus) benefits from receiving carbohydrates and other nutrients from the plant, while the plant benefits from enhanced nutrient uptake, particularly in accessing phosphorus and other minerals from the soil. c) Antagonism: Antagonism refers to an interaction between two organisms that is harmful or detrimental to at least one of the organisms involved. In this type of relationship, both organisms compete for resources or produce substances that inhibit the growth or survival of the other. Mycorrhiza does not exhibit antagonism; instead, it shows mutualistic symbiosis. d) Endemism: Endemism refers to the ecological state of being unique to a particular geographic region or location. It describes species or organisms that are restricted to a specific area and are not found elsewhere. Mycorrhiza is not related to endemism. It is a widespread phenomenon found in various ecosystems around the world where mycorrhizal fungi associate with plants. In summary, the correct answer is b) Symbiosis. Mycorrhiza exhibits symbiosis, specifically mutualistic symbiosis, between certain fungi and the roots of most higher plants, benefiting both partners in the relationship.