A symbiotic relationship.
Fungus and algae
mushroom
Lichen is a symbiosis between an algae and a fungus.
symbiotic(as in lichen)
The relationship between fungi and ants mostly involve the ants actively cultivating the fungus in the same way a farmer cultivates crops. The fungus, in turn, provides nutrients for the ant colony.
One symbiotic relationship in the tundra is the one between the alga and the fungus. This relationship is known as lichen. The alga is protected by the fungus and the fungus receives food from the alga.
A lichen is a composite organism made up of a fungus and an autotroph. Lichens are commonly used in making dyes and perfumes.
A symbiotic relationship between a fungus and an algae or cyanobacteria.
The beneficial relationship between a plant and fungus is called "Eukaryotic".
Lichen is a symbiotic relationship between a fungus and a plant.
A symbiotic relationship between a fungus and green algae or cyanobacterium is a lichen. This occurs because lichen are composite organisms that consist of a symbiotic association to a fungus with a photosynthetic partner. In this example the photosynthetic partner is the cyanobacteria.
As lichens are a not a single living organism, but are rather a symbiotic relationship between a fungus and an algae (ie. a relationship where one is needed for the other to survive, and vice-versa), they cannot be classified into one kingdom. This is because a fungus (obviously) is part of the fungus kingdom, and algae is part of the plant kingdom.