The other organism is usually a cyanobacterium or green alga. What are Tree Lichens? Lichens need moisture, dew, or rainfall to survive. Mycorrhizal Fungi and Plant Roots: A Symbiotic Relationship. All animals and non green plants are heterotrophic. Lichens are complex organisms created through a symbiotic relationship between two separate organisms. Lichens. Lichens are a symbiotic association between a fungus and an algae or a cyanobacterium The symbiotic association found in lichens is currently considered to be a controlled parasitism, in which the fungus benefits and the algae or cyanobacterium is harmed Lichens are slow growing and can live for centuries in a variety of habitats Lichens are the symbiotic association of algal and fungal part so, are closely associated with each other.so, that they provide single body structure. The lichen consists of hyphae (fungal filaments) surrounding the cells of algae. A lichen is a stable symbiotic association between a fungus and algae and/or cyanobacteria. A lichen is an organism that results from a mutualistic relationship between a fungus and a photosynthetic organism. Lichens are formed from a combination of a fungal partner ( mycobiont) and an algal partner ( phycobiont ). Lichens can survive in harsh climatic conditions. The importance of this mutualism in terms of ecology, biodiversity and global well-being cannot be overstated. Symbiotic Mode of Nutrition. Lichens are the symbiotic association between algae and fungi. The fungal filaments surround and grow into the algal cells, and provide the majority of the lichen's physical bulk and shape. Lichens resemble plants or fungi, with elaborate branches like ocean coral, tiny cup-like structures, or leaf-like fronds. Lichens can reproduce asexually through the dispersal of small fragments of thallus or through propagules (diaspores) tipically containing cells from the symbiotic partners. Symbiotic nutrition is that which is made by some biotic thing or the raw material will be biotic and the product is made by man so it is symbiotic MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. ymbiosis is a mode of heterotropic nutrition. There is a symbiotic relationship between green algae and fungus. Lichens are a “complex life form that is a symbiotic partnership of two separate organisms, a mushroom like organism and an algae,” according to the USDA. Symbiosis is when at least two organisms live in close proximity, and at least one benefits from the relationship. Algal part is known as phycobiont. LICHENS. Lichens are a product of a symbiotic relationship between fungi and algae. The Lichen Symbiosis. There are about 13,500 species of lichen on the Earth. The alga that is associated with fungus is a green or blue-green alga. Answer: Symbiosis is the mutually benefitting association between two plants, e.g. Lichen Symbiotic Nutrition-Algae synthesis sugars and sugar alcohol and shares with algae-Algae can also fix nitrogen-Fungus retains water. Lichens are symbiotic associations of fungi and algae. Light. Solving the Nutrition in Plants Multiple Choice Questions of Class 7 Science Chapter 1 MCQ can be of extreme help as you will be aware of all the concepts. During the hot summer months and dry spells, lichens go dormant and wait for the next rainfall. This kind of nutrition is known as symbiotic relationship. The discovery that specific yeasts act as third symbiotic partners in lichens began with an investigation into why two lichen species seemed genetically identical but had distinctive attributes. When you see one, you’ll often see several forms of lichens, perhaps an orangey-red flat lichen under a clubby lichen. 0 Reviews. Example: Pinus. Lichens are a specific group of fungi unique because of their symbiotic relationship with green algae. How to Get Lichen to Grow on Rocks Move rocks to a shady area in the garden. For example: Lichens. Appressorio-puncturing into cell Lichens are composite organisms composed of fungus and alga. Explain the symbiotic relationship in lichens. In lichens, a chlorophyll-containing partner, an alga, live together with a fungus. The fungus provides shelter, water, and minerals to the alga and in return, the alga provides food which it prepares by photosynthesis. Question 7. c. A crustose lichen, growing on rocks leading to the breakdown of rock into soil. Each organism relies on the other for survival. When isolated in pure culture, four genera of lichen algae were able to produce the polyol which is known to move from the alga to the fungus in lichens with these algae. There are 3 types of symbiotic relationships: mutualism, commensalism and parasitism. Symbiotic – Obtaining nutrition through a mutually beneficial relationship with another organism. Algae have chlorophyll and produce food through photosynthesis while the fungi provide shelter to the algae and help it … Symbioses are evolutionarily and ecologically widespread, yet we lack a robust understanding of their origins, losses, and macroevolutionary consequences. In contrast, fungi are 'heterotrophic' and require an external source of food. Each organism relies on the other for survival. A mutually beneficial relationship that occurs between two plants. In some ways, the symbiotic relationship between lichens and algae seems like a mutualism (a relationship in which both organisms benefit). The fungus can obtain organic nutrients from the photosynthetic algae or cyanobacterium and the algae or cyanobacterium can grow in a drier environment than it could otherwise tolerate. From the point of view of their nutrition the fungi may be classified as saprophytes, parasites, symbionts and predacious fungi. The major component is a fungus (mycobiont), hence they are classified as fungi — the vast majority being ascomycetes. It provides a powdery appearance. Hence they show modes of Nutrition such as: Saprophytic – Obtaining nutrition from dead matter Eg. The fungi member is known as mycobiont and algae member is known as phycobiont. Fungus is a saprophyte and alga is an autotroph. Fungi are usually colourless. A lichen looks like a single organism, but it is actually a symbiotic relationship between different organisms. Lichens are complex organisms created through a symbiotic relationship between two separate organisms. lichens and Rhizobium. Lichens are living organisms composed of a fungus and algae living in a symbiotic relationship. CHARACTERISTICS OF SYMBIOTIC NUTRITION 1. The hermatypic coral Porites divaricata was used in most experiments, particul'arly because it could be easily sampled and because it The reproductive organs, however, are entirely fungal in character. Depending on the nature of the fungal partner, a lichen is designated as either an ascolichen or a basidiolichen. Sea anemones and hermit crabs 4. d. Notice the stones darkening with lichen growth in a few weeks. The product of this symbiosis is the organism we commonly know as “lichen.” And oh how they do thrive together! Probably food materials from the alga diffuse out and are absorbed by the fungus. Lichens are a symbiosis of a fungus and one or more partners—a green algae and/or a cyanobacterium. Fungi feed on dead and decaying matter. How do lichens get their nutrition? Lichens. Lichen, any of about 15,000 species of plantlike organisms that consist of a symbiotic association of algae (usually green) or cyanobacteria and fungi (mostly ascomycetes and basidiomycetes). The fungi provide a moist, sheltered habitat for the cyanobacteria or algae, and, in turn, they provide food for the fungi. General characters:The intimate symbiotic association of fungi and algae is called lichens.Algae get protection and get moisture from fungus.Fungi get nutrition from the algae.The food substances diffuse from algae to fungi.The algae of lichens mostly belong to Chlorophyta and cyanobacteria. … A lichen is a dual organism consisting of a type of fungi and algae or bacterium. brewbooks 12y OK - thanks, I will declare victory and move on, appreciate the help. It is a mode of nutrition in which there is an interaction between two different organism living in close physical association with each other. It... Similar to plants, all lichens photosynthesize. Lichen-forming fungi employ a successful mode of nutrition as symbiotic partners with green algae and/or cyanobacteria (the photobiont). Here is an example to illustrate the difference. Spray the rocks generously with a one-time liquid seaweed fertilizer, milk or yogurt. This association is called the symbiosis and the participants are symbionts. The algal and bacterial partner(s) each have their own scientific names, but the lichen symbiosis is known only by the name of its fungus. They are capable of producing their own food. Fungi are incapable of photosynthesisbecause they lack the green pigment chlorophyll. We have Provided Nutrition in Plants Class 7 Science MCQs Questions with Answers to help students understand the concept very well. Many lichens partner include either one photobiont or more than one photobiont and one mycobiont, which generally varies. Lichens are associations between fungi and cyanobacteria (formerly called blue-green algae). Therefore, lichens are not actually harming the trees on which they are growing. The mode of nutrition where two different organisms work together for their mutual benefit. Such type of nutrition is called symbiosis nutrition. F... LICHENS. There are many types of symbiosis found in the natural world but the type of symbiosis in lichens is unique to them. Caribou and reindeer eat lichens, and they provide cover for small invertebrates that hide in the mycelium. 8. They can thrive in seemingly hostile environments, such as the tundra, thanks to a most successful symbiosis with photosynthetic organisms like algae to produce lichens. The fungus provides the structure to the lichen and the alga provides the food through photosynthesis. The Fungus supplies water and minerals to the cells of the alga while the alga supplies food, prepared by photosynthesis. Lichens, which often have symbiotic relationships with other plants, can sometimes be found growing on trees. These MCQ Questions on Nutrition in Plants Class 7 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Give an example. The cyanobacteria are the photosynthetic elements in the association, which is an example of mutualism (a living arrangement where both partners benefit). Lichens. The lichen symbiosis is an association between fungi and algae which develop into distinct morphological forms where the alga develops into a phycobiont and the lichen … Saprophytic plants are the plants that depend on dead organic matter for their nutrition. Fungus is a saprophyte and alga is an autotroph. About 17,000 species have been identified, and journals concerned with lichenology are published in several countries. This relationship involves a fungus (heterotrophic partner) and algae or cyanobacteria (the autotroph). Cercospora. decaying matter are called saprotrophs and the mode of nutrition is called saprotrophic nutrition. Fungi play a crucial role in the balance of ecosystems. Coenogonium leprieurii, for example, is a lichen that lives in low-light tropical and subtropical forests in which the filamentous green algal partner (Trebouxia) is dominant. Symbiosis is mutually beneficial association existing between two organisms and both organisms derive benefit from each other without causing any harm to each other. Vain, provide evidence of the existence of a delicate state of balance between the co‐symbionts of this lichen. Lichens are commonly formed through a symbiotic relationship with an association between the algae and fungi, whereby, the survival of the fungi depends on its association with the green algae (cynobacterial which is the (photobiont) and feeding on the sugars and nutrients the … In this relationship, the plant feeds the fungus, while the fungus supplies the plant with mineral nutrients ( especially phosphorous) and according to some sources additional moisture. Check the below NCERT MCQ Questions for Class 7 Science Chapter 1 Nutrition in Plants with Answers Pdf free download. The symbiotic relationship is established because the fungus is receiving nutrition while the algae is receiving protection. In fact they are actually an alga and a fungus growing together in the same body in a symbiotic relationship. In … In most lichen species, however, the relationship between the symbiotic partners is more intimate, with the lichen body appearing to be a single entity. There are an estimated 30,000 lichen species around the world. Excessive supply of nutrients to discs of the lichen results in the outgrowth of the phycobiont and consequent destruction of the symbiotic relationship. In organisms called lichens, alga and a fungus live together. Lichens are … LICHEN BASICS. Lichen is thallophytic, composite and symbiotic organism. After a lichen symbiosis is established, the fungus has the greatest influence on the final form of the lichen body’s shape, and whether it is tough or flexible. The symbiotic association found in lichens is currently considered to be a controlled parasitism, in which the fungus benefits and the alga or cyanobacterium is harmed; Lichens are slow growing and can live for centuries in a variety of habitats. Mycorrizal fungi help plant roots absorb nutrients and fight off harmful, soil-dwelling predators. They colonize most habitats on Earth, preferring dark, moist conditions. An epiphyte is a plant that grows on other plants, but is not dependent upon the other plant for nutrition . Lichens grow freely when exposed to air and light. In organisms called lichens, alga and a fungus live together. Parasitic – Obtaining nutrition from living organisms Eg. The algae are autotrophic and prepare their own food whereas the fungi are heterotrophic. This conclusion corrects earlier suggestions that the mobile polyol is only formed by the alga in the lichen thallus. Lichens are composite organisms composed of fungus and alga. Lichens are a specific group of fungi unique because of their symbiotic relationship with green algae. Fungi are usually colourless. Epiphytes An epiphyte is a plant that grows on other plants, but is not dependent upon the other plant for nutrition; it is non-parasitic. In this page, we are providing Nutrition in Plants Class 7 Extra Questions and Answers Science Chapter 1 pdf download. Covering about 7 percent of earth's surface, lichens are described as a symbiotic association consisting of two types of organisms that function as a single unit. Fungus provides Based on their mode of nutrition, lichens are in a symbiotic relationship between green algae and fungus. Lichens are made up of two or more closely interacting organisms, a fungus, and one or more partners, called photobionts. Lichen is composed of two or more dissimilar organisms that form a mutually beneficial (symbiotic) relationship to produce a new vegetative body that is called a thallus. Alga and fungus live together. Since lichen are made of these two things, lichen can conduct photosynthesis as well as absorb nutrition from organic outside substances. In a symbiotic relationship, two organisms function in a way that is mutually beneficial. The symbiotic relationship is established because the fungus is receiving nutrition while the algae is receiving protection. Therefore, lichens as individual organisms and how they fit into ecosystems are a great example of symbiotic evolution. Step 2 : Solved to the question “Lichens are a result of a symbiotic relationship between what?“ Fungus and algae: It is an interaction or interrelationship between two organisms for a mutual benefit or dependence. b. Mycorrhizae: Fungi associated with roots of higher plants including Gymnosperms. Here we report the discovery of lichen-like fossils, involving filamentous hyphae closely associated with coccoidal cyanobacteria or algae, preserved in marine phosphorite of the Doushantuo Formation (between 551 and 635 million years old) at Weng'an, South China. Mutualism. Symbiotic Association of Lichens: In lichens, a photosynthetic component in the form of a green alga or cyanobacterium is permanently associated with a fungus, generally an ascomycetes and rarely a basidiomycete. Here we report the discovery of lichen-like fossils, involving filamentous hyphae closely associated with coccoidal cyanobacteria or algae, preserved in marine phosphorite of the Doushantuo Formation (between 551 and 635 million years old) at Weng'an, South China. c. Rhizobium and Legumes: This symbiotic association fixes atmospheric nitrogen. Lichens are a unique combination of two separate organisms — fungi and algae, or sometimes cyanobacteria — that live in a symbiotic relationship on trees, rocks and other surfaces. Nearly one fifth of all known fungi are obligate lichen formers, yet we know little of how they find compatible partners and establish long-lived symbiotic relationships. The fossil record of fungi and lichens is scarce. Explain symbiotic nutrition in lichens 2 See answers binodbam2003 binodbam2003 Answer: A lichen is not a single organism; it is a stable symbiotic association between a fungus and algae and/or cyanobacteria. Symbiosis is any type of a close and long-term biological interaction between two different ... The definition of symbiosis was a matter of debate... Expert Answer: Lichens are symbiotic associations of algae and fungi. Answer: In lichens, a chlorophyll-containing partner, an alga, live together with a fungus. Crustose are species that Fungus - Fungus - Mycorrhiza: Among symbiotic fungi, those that enter into mycorrhizal relationships and those that enter into relationships with algae to form lichens (see below Form and function of lichens) are probably the best-known. Lichens. Lichens are composed of 2 different living organisms, fungi and algae, which belong to the Kingdom Protista. In other words, lichens do not harm the tree bark they perch on one way or the other. Fungal part is known as mycobiont. This video is highly rated by Class 7 … When 2 organisms stay together and mutually benefit each other or come into each other’s use. For example :birds sitting on the body of elephant or... The algae contains the green pigment called chlorophyll which helps the algae to produce food which is being provided to the fungi too. Symbiosis is close and long-term biological interaction between two different biological organisms. Both are get beneficial in this process. Symbiotic nutrition is the relationship between the organisms in which they share their nutrition and shelter. Lichens thus are biotrophic in their mode of nutrition as they obtain their food from the living algal associate. May 31, 2021 - L9 : Symbiosis: Lichens - Nutrition in Plants, Science, Class 7 Class 7 Video | EduRev is made by best teachers of Class 7. In this association, the fungi (called mycobiont) facilitate water, minerals, vitamins, etc to the algae and algae (called phycobiont) prepare carbohydrate by the process of photosynthesis and supply the food to the fungi. Concept: Five Kingdom Classification - Kingdom Fungi. Vain, provide evidence of the existence of a delicate state of balance between the co‐symbionts of this lichen. The fungi provide a moist, sheltered habitat for the cyanobacteria or algae, and, in turn, they provide food for the fungi. The life forms are composed of a fungus (kingdom Fungi) and most often a green alga (kingdom Protoctista) and/or a cyanobacterium (kingdom Monera). It is known by what name? b. Symbionts: Lichens, which result from the symbiotic relationship between fungi and green algae, are often seen growing on trees. What is lichen Class 7? Lichens is a symbiotic relationship between different organisms – a fungus and an alga. They can grow on rocks, decaying wood logs, tree barks etc. Lichens are used to prepare natural indicator called litmus. d. They share shelter and nutrients, e.g. The importance of this mutualism in terms of ecology, biodiversity and global well-being cannot be overstated. The photobiont may be an alga and/or cyanobacteria, both of which can produce simple sugars by photosynthesis. Excessive supply of nutrients to discs of the lichen results in the outgrowth of the phycobiont and consequent destruction of the symbiotic relationship. They share shelter and nutrients, e.g. Lichens on trees are unique and harmless but some may consider them unsightly. This is called symbiotic relationship. nutrition in lichen are symbiotic association of algae and fungi ..the algae are autotrophic and prepare their own food whereas fungi are heterotrophic.... aqibkincsemaqibkincsem. Two different kinds of organisms live together for their mutual benefit. The fungus also plays a vital role in providing a physical structure to shelter the algae from excess sunlight and in particular, water loss. This symbiotic relationship creates a vegetative body called a thallus, which is the lichen you see on the trees. Termites and protozoa living together in the gut The part played by lichens in the nitrogen economy of natural ecosystems is reviewed. When people use the word symbiosis, they’re usually talking about a mutualistic symbiotic relationship.Mutualism is a close, long-lasting relationship where both parties benefit. The pilot fish benefit from hanging … The photosynthetic partner is generally green algae or cyanobacteria. Found on soil, tree bark, rocks and even some under water, they are actually two organisms living together (symbiosis). The pigments used in litmus paper are also extracted from lichens. Lichens. The photosynthetic organism provides carbon and … Lichens are a symbiotic collection of fungi and cyanobacteria or algae. LICHENS. Lichens were also some of the first land-dwelling organisms, suggesting that a communal effort helped life make the ocean-to-land leap. Bacteria in human intestine which get the food and shelter and in return help us in absorbing vitamin k and breaking down the food. In some species of lichen, fungal and algal cells merely coexist. Explain symbiotic nutrition in lichens 2 See answers binodbam2003 binodbam2003 Answer: A lichen is not a single organism; it is a stable symbiotic association between a fungus and algae and/or cyanobacteria. LICHENS. 24.3: Ecology of Fungi. Lichens are an example of a symbiotic relationship between algae and certain fungi. Lichens are plant-like organisms. Since the photobiont photosynthesizes like a plant, lichens do not obtain their nutrition from their host. This is called symbiotic relationship. Complete answer: Lichens are organisms that have a symbiotic relationship between algae and fungi. Instead, they need to seek out outside sources of food. Culture studies and field observations on Peltigera praetextata (Flk.) Question 24. Lichens. The fungus cannot make its own nutrition, so it protects an interior deposit of algae or cyanobacteria, which produces food through photosynthesis. a. Lichens: It is a mutual association of Algae and Fungi. Symbiotic Lichens Showcase Our Creator's Ingenuity. How do lichens get their nutrition? Symbionts obtain nutrition from the host. This association is called symbiosis and such plants are called symbiotic plants. a. Lichens: It is a mutual association of Algae and Fungi. The body of a lichen, referred to as a thallus, is formed of hyphae wrapped around the photosynthetic partner. Answer: Lichen is an organism which is composite and initiates from algae or the cyanobacteria which live in the filaments or the fungus species. An example is lichens where a symbiotic relation exists between the alga and fungus. SEM of lichen: the linear fungal hyphae and the roundball-like algal groupings. The autotrophic nutrition of symbiotic marine coelenterates. The lichen consists of hyphae (fungal filaments) surrounding the cells of algae. Revise all the concepts easily by taking help from the MCQ Questions for Class 7 Science with Answers are prepared based on … World Scientific, Dec 29, 2016 - Science - 680 pages. Lichens come in many colors, sizes, and forms and are sometimes plant-like, but lichens are not plants. The fungus derives nutrition from the alga which in turn is protected by the fungus. In contrast, fungi are 'heterotrophic' and require an external source of food. Lichens are a group of composite organisms, found worldwide and mainly grow in various places like tree barks, rocks, walls, on roofs, gravestones, soil, etc. The identification of lichen as a composite organism of cyanobacteria or algae and fungi dates back 150 years, representing the first identification of such intimate symbiosis. For example, algae, which is an autotroph, and fungus, which is a saprophyte, live together in lichen. They can be found growing in forests, deserts, arctic tundra, or even in your backyard on rocks or walls. One of the organisms that make up this partnership is a fungus, while the other is either a green algae or a blue-green algae called cyanobacteria. Symbiotic Mode of Nutrition. We traced the evolution of partner choice and phenotype in lichens—a classic model of symbiosis—and revealed shifts among symbiont groups and phenotypic evolution. Algae and Fungi in a lichen 3. (iii) Plants can use atmospheric nitrogen directly. Complete answer: Lichens are organisms that have a symbiotic relationship between algae and fungi. Symbiosis is mutually beneficial association existing between two organisms and both organisms derive benefit from each other without causing any harm to each other. 1999. Culture studies and field observations on Peltigera praetextata (Flk.) One of the organisms that make up this partnership is a fungus, while the other is either a green algae or … They absorb nutrition from organic substances, that is, Owing to their importance as primary producers of energy and nutrition, algae and cyanobacteria are found as symbiotic partners across diverse lineages of prokaryotic and eukaryotic kingdoms. Nearly one fifth of all known fungi are obligate lichen formers, yet we know little of how they find compatible partners and establish long-lived symbiotic relationships. Algae prepares food and fungi absorbs water and provides thallus structure. Eg. 9. Both coexist together to allow it to exist in harsh climates ( 1 , 2 ). Organisms can use other organisms for cleaning, protection or gathering food. (i) The bacteria present in root nodules of plants that fix atmospheric nitrogen is blue green algae (ii) In a cactus plant leaves prepare food. Culture studies and field observations on Peltigera praetextata (Flk.) They are found in a clean environment with sufficient air for their growth. Symbiosis and its Categories. They are all around us and we hardly notice them. Two examples of this are lichens and mycorrhizal fungi. For example, certain fungi live in the roots of trees. Lichen is an … That is to say, fungi cannot harvest light energy from the sun and generate their own nourishment in the form of carbohydrates. There are three forms of lichens based on growth patterns. Step 2 : Solved to the question “Lichens are a result of a symbiotic relationship between what?“ Fungus and algae: c. Rhizobium and Legumes: This symbiotic association fixes atmospheric nitrogen. Boil a pint of milk, 1 tsp. Symbiotic relationship: Some organism live together for their mutual advantage. Lichens are created from a mutualistic relationship between fungi and algae. protects light from causing self photodestruction. In symbiosis or mutualism two different types of organisms live and work together for their mutual benefit from each other. Lichen is a set of two organisms working as one. Alga contains chlorophyll and is autotroph, while fungus lacks chlorophyll and is heterotroph. About 15000 species are included in this group. Lichens. Lichens consist of a fungus living in a symbiotic relationship with algae or cyanobacterium. In return the fungi protects the algae from drying in sunlight by enclosing it inside. Living as a symbiont in a lichen appears to be a successful way for a fungus to derive essential nutrients, as about 20% of all fungal species have acquired this mode of life. Mycorrhizae is the relationship between a fungus and a higher plant's root system. Lichens are … They aren’t a moss and they aren’t a plant. Nitrogen fixation bacteria and root nodules of leguminous plants 2. I 113 The investigations, carried out during 9 weeks in Jamaica, made use of a range of symbiotic coelenterates. Living as a symbiont in a lichen appears to be a successful way for a fungus to derive essential nutrients, as about 20% of all fungal species have acquired this mode of life. A lichen is a composite organism that emerges from algae or cyanobacteria living among the filaments of the fungi in a mutually beneficial symbiotic relationship. The fungal hyphae give the lichen thallus its characteristic shape, and the cells of its photosynthetic partner are dispersed among them. The living beings on which the fungi parasitize are called the hosts. Because the algae derive nutrients through photosynthesis, and the fungi protect the algae from drying out, lichens can live and grow in extremely barren areas. The Lichen Symbiosis. In this relationship, the algae provide carbohydrates from photosynthesis to the fungus, while the fungus provides nutrients from decomposition to the algae. Fungi are heterotrophic in nature. Fungus-Alga contact: Appressorio and Haustoria. The mode of nutrition in which organisms take their nutrients from dead and decaying matter is called saprotrophic mode of nutrition. The thallus develops on the surface of the substratum. iii) Symbiotic nutrition: The mode of nutrition in which two different organisms live together, share shelter and nutrients is called symbiotic nutrition. T he algal cells, through the process of photosynthesis, provide the fungus with some of the organic nutrients which it needs.

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