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11 Cards in this Set
- Front
- Back
fungi |
are eukaryotes that have cell wall are heterotrophs(feeds by absorption) reproduce by spores found in moist and warm places |
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structure of fungi |
-range from unicellular yeast to multicellular fungi -cells of all fungi are surrounded by cell wall -except for yeast most fungus are made of threads-like called hyphae -the hypha of some fungi are continuos threads of cytoplasm that contain many nucleus. -the look of the depends on how is the hyphae arranged. |
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nutrition |
hyphae grow into food source digestive chemicals are released into food food broken down into small substances absorbed by hyphae |
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reproduction |
usually reproduce spores have a protective covering around them spores are carried through air or water spores are formed in large number spores are formed in fruting bodies |
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reproduction |
-asexual:when conditions are favorable fungi make spores asexually -cells at the trip of the hyphae divide to form spores. -spores grow into fungus genetically similar to parent. -unicellular yeast asexually reproduce by: budding. no spores are formed. a bud like structure forms from the body of the yeast which separates and live on its own. |
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sexual reproduction |
when conditions are unfavorable the hyphae of 2 fungi grow together and genetic material is exchanged. a new reproductive structure grows from the joined hyphae and produces spores. the spores develop into fungi genetically different from the parents. |
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The role of fungi in nature |
food and fungi -yeast molds mushroms |
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Environmentalrecycling |
Likebacteria, many fungi act as decomposers. They break down the chemicals in deadplants.Helpsin returning back the nutrients to the soil. Diseasefighting Fungi: Used to make several antibiotics. Fungus called Penicillium gave us the first antibioticPenicillin.Diseasecausing Fungi:In plants Corn smut, Wheat rust.In animals : Athelete`s foot fungus, Ringworm. |
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Fungus-plantroots associations |
some fungus help otherplants by absorbing water and nutrients for the plant through their hyphae,this helps the plant grow bigger and better. The fungus in return feeds on theextra food that the plant makes. |
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lichens |
Firstorganisms to appear on bare rocks in an area after volcanic eruption, fire orrock slide.Consistsof a fungus and either algae or autotrophic bacteria that have a Mutualisticrelationship. |
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lichens 2 |
Thefungus obtains the food made by the algae/ bacteria.Thealgae/bacteria get water, shelter and minerals from the fungus.Importance of LichensOvertime break down rocks into soil.Indicatorsof air pollution. |