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Unit 2 Lab Fungi - Principles of Biology 2 Unit 2 Lab Fungi...

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Principles of Biology 2 Unit 2 Lab Fungi I. Introduction The members of the Kingdom Fungi are heterotrophic organisms. Some of the members are saprobic , meaning they obtain nutrients from nonliving organic material, while others are parasitic ; they obtain nutrients from the tissues of living hosts. Most fungi are multi-cellular. The food-absorbing portion of the fungal body is called the mycelium and is composed of a mesh of filaments called hyphae . All fungi produce spores (small, haploid cells with a protective coat), which function in both sexual and asexual reproduction. The Kingdom Fungi is divided into four divisions based on the type of structure that produces these spores. KINGDOM FUNGI Division Zygomycota Reproduce through the production of a zygospore . Examples include Rhizopus ( black bread mold ), & Pilobus ( the gun fungus ). Division Ascomycota Commonly called the “Sac fungi”. A fingerlike sac called the ascus produces eight ascospores during sexual reproduction. Examples: Morels, Peziza (the cup fungus), Saccharomyces (Yeast) Division Basidiomycota The “Club fungi” as they are known are probably the most recognizable group of the fungi. The mushroom or basidiocarp is the fruiting body which produces the basidiospores . Examples: Mushrooms, Shelf fungus, & Puff balls. Division Deuteromycota The “imperfect fungi” are not known to have a sexual reproductive stage. The conidiospores form on upright hyphae known as conidiophores . Example: Penicillium, & Aspergillus. Lichens Lichens are an example of symbiosis , a close ecological association between two species, involving a fungus and an algae. The algal portion provides photosynthetic abilities, while the fungal portion provides stability, water, and nutrients. Lichens typically colonize sites that are hostile and slowly change the site so that it becomes suitable for other organisms. Lichens are found in three forms: crustose, foliose , & fruticose .
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Observe specimens of common mushrooms by referring to the following web site http://tomvolkfungi.net These images may also be located in Unit 2 Lab Tutorial. You are responsible for recognizing each specimen, citing the appropriate Division and common name, and recalling all notable structures on the weekly lab quiz .
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