______ are a symbiosis between a photosynthetic organism and a fungus.
Symbiotic relationships include those associations in which one organism lives on another (ectosymbiosis, such as mistletoe), or where one partner lives inside the other (endosymbiosis, such as lactobacilli and other bacteria in humans or Symbiodinium in corals). Fungi and Insect Symbiosis. We have previously described examples of symbiosis between fungi and photosynthetic organisms, i.e. mycorrhizae and lichens. Today, we will cover examples of symbiosis involving fungi and animals, specifically insects. We hear much less of fungus-animal symbiosis and usually think of such relationship only as one of host-parasitic relationship. However, the true relationship between fungi and animals are often not known. Part 1 | Part 2 | Part 3 | Part 4 | Part 5. Biology : Symbiotic Fungal Associations: Lichens and Mycorrhizae : Part Five. Symbiotic Fungal Associations: Lichens and Mycorrhizae. Lichens are a symbiosis between a photosynthetic organism (an alga or cyanobacterium) and a fungus (either an ascomycete or a basidiomycete). Lichen often live in marginal environments and often grow only one or two centimeters per year. An example of mutual symbiosis is the relationship between the ocellaris clownfish that dwell among the tentacles of Ritteri sea anemones. The territorial fish protects the anemone from anemone-eating fish, and in turn the stinging tentacles of the anemone protect the clownfish from its predators. The formation of mycorrhiza is a symbiotic relationship between plant roots and fungi. Another example of a symbiotic relationship between fungi and a photosynthetic organism is A. a moss. B. a lichen. C. a mold. D. a mushroom. I can't agree. Moss is just plant. Correct answer is a lichen. It's a composite organism made up from fungus and cyanobacteria, which is photosynthetic organism. Example of lichen could be Map lichen (Rhizocarpon geographicum), or Iceland moss (Cetraria islandica), which, despite it's name, isn't the moss. Without the algae the lichen cannot make photosynthesis.The algae is called the photobiont , the photosynthesis partner.In the lichen , the fungus surrounds the algae cells , enclosing them , almost in their complex tissue formations.The algae acts as the food supplier and the fungus is the support.So , you cannot call this a symbiotic relationship ... Best Answer: LICHENS AND THEIR RELATIONSHIP WITH ALGAE. Lichens are symbiotic associations of a fungus with a photosynthetic partner (called a photobiont or phycobiont) that can produce food for the lichen from sunlight. The photobiont is usually either green algae or cyanobacteria. A few lichens are known to contain yellow-green algae or, in one case, a brown alga. A mutualistic relationship between a fungus and an organism that conducts photosynthesis is known as a lichen. In this type of arrangement, the fungus receives food through the photosynthetic organism. In turn, the fungus provides the organism with water and nutrients. Green algae is one example of this type of organism. When the two join together, lichen is formed. Synnecrosis is a rare type of symbiosis in which the interaction between species is detrimental to both organisms involved. It is a short-lived condition, as the interaction eventually causes death. Because of this, evolution selects against synnecrosis and it is uncommon in nature. Some symbiotic relationships are obligate, meaning that both symbionts entirely depend on each other for survival. For example, many lichens consist of fungal and photosynthetic symbionts that cannot live on their own. Others are facultative (optional): they can, but do not have to live with the other organism.
Lichens