Saddleback BIO 3B - Laboratory Fungal Diversity (5 pages)

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Laboratory Fungal Diversity



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Laboratory Fungal Diversity

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Pages:
5
School:
Saddleback College
Course:
Bio 3b - General Biology II

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Biology 3B Laboratory Fungal Diversity Objectives To describe the general characteristics of the phyla in the kingdom Fungi To learn the anatomy life cycle and identification of representative fungal organisms To discuss the ecological role and economic importance of fungi Introduction The kingdom Fungi is one of four kingdoms in the domain Eukarya This kingdom consists of over 70 000 identified species with estimates over 1 5 million fungal species This kingdom consists of a diverse group of organisms that range from unicellular yeasts to multicellular most organisms Fungi are economically and ecologically important Economically fungi are beneficial in that they are used to produce various food items leaven bread cheeses etc medicines beverages etc Some fungi are parasitic on plants and animals Numerous fungi have even cause widespread famine or diseases as a result of infestations potato famine ergotism All members are heterotrophic where many obtain their nutrients by releasing exoenzymes into their surrounding environment to breakdown food items outside the body and then absorbing the nutrients into their cells Fungi that feed on dead organic material are referred to as saprobes and comprise one of the principal decomposers one Earth Parasitic fungi that found on other living organisms have specialized structures called haustoria haustorium singular to penetrate the host organism for nutrient absorption There are still other fungi that form a mutualistic relationship with another organism while a few are even predators of nematode worms Although fungi were once classified with plants fungi have several major differences from plants As mentioned before fungi are heterotrophic Like plants all fungi have cells walls however fungal cell walls are composed of chitin instead of cellulose Fungal bodies vegetative are composed of long slender filaments called hypha hyphae plural which form more complex structure when compacted together In most fungi the hyphae form a



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