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Symbiotic Relationships. SNC 1D. Symbiosis: the close interaction between two or more different biological species In nature, symbiosis has been observed between plants, animals (including bacteria) and a combination of the two.
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Symbiotic Relationships SNC 1D
Symbiosis: the close interaction between two or more different biological species • In nature, symbiosis has been observed between plants, animals (including bacteria) and a combination of the two. • The type of symbiosis is defined by who benefits in the relationship.
Mutualism • Interaction between two different species where BOTH receive individual benefits. • Half of land plants rely on relationship with fungus in roots to provide nitrogen and other nutrients. • Ex. Bacteria in ungulates
Commensalism • Interaction where one individual benefits without affecting the other negatively. • Not as common as other types. • Ex. Trees provide mosses shade with no real detriment.
Parasitism • Interaction where one species (the parasite) benefits at the expense of the other, the host. • Parasites use their host’s resources to survive, but do not kill it. • Ex. Tapeworms, head lice, some birds, mosquitoes.