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11 Cards in this Set

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fungi

are eukaryotes that have cell wall


are heterotrophs(feeds by absorption)


reproduce by spores


found in moist and warm places

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.

nutrition

hyphae grow into food source


digestive chemicals are released into food


food broken down into small substances


absorbed by hyphae



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

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.

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.

The role of fungi in nature

food and fungi


-yeast molds mushroms



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.

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.

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.

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.