October 25-ch22 - October 25, 2007 Chapter 22 Fungi Fungal...

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October 25, 2007 Chapter 22 Fungi Fungal Body and Structure Most fungi are multicellular Cells are surrounded by cell walls composed of chitin, a nitrogen containing polysaccharide Thallus (body) of almost all fungi is a mycelium o Interwoven mass of threadlike filaments called hyphae (singular, hypha) Hyphae of most species are divided into many cells by partitions called septa Each cell possesses one or more nuclei o Pores in the speta allow cytoplasm to move up and down the hyphae Hyphae of some fungi lack speta, consisting of single elongated cells All fungi are heterotrophic o Enzymes secreted outside their bodies o Absorb nutrients digested and absorbed Nutrition and Fungal Lifestyles Diverse lifestyles o Fungal decomposers feed on dead organic material and wasters o Fungal parasites absorb nutrients from cells of living hosts o Some symbiotic fungi o Some feed on living organisms Propogated by spores Spores are haploid reproductive cells capable of developing into adult fungus
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This note was uploaded on 04/10/2008 for the course BIOLOGY 101 taught by Professor Beitch during the Spring '07 term at Quinnipiac.

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October 25-ch22 - October 25, 2007 Chapter 22 Fungi Fungal...

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