Chapter 31

Chapter 31 - BIO 152 Notes Chapter 31 Fungi Concept 31.1...

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BIO 152 Notes Chapter 31: Fungi Concept 31.1: fungi are heterotrophs that feed by absorption exoenzyme – powerful hydrolytic enzyme, breaks down complex molecules into compounds that fungi can absorb saprobes – fungi that live as decomposers , break down nutrients from nonliving organisms parasites – absorb nutrients from living organisms mutualist symbionts – take nutrients from living organisms, but help organism in another way yeasts – single celled fungi hyphae – network of tiny filaments chitin – polysaccharide containing nitrogen, forms walls of hyphae (flexible) mycelium – network of hyphae septa – cross walls in hyphae, have pores that allow mitochondria/ribosomes/nuclei to pass through coenocytic fungi – fungus that lacks septa (slime molds?) haustoria – hyphae that can penetrate the tissues of a host mycorrhizae – mutually beneficial relationship w/ haustoria involved Concept 31.2: fungi produce spores through sexual or asexual life cycles haploid dominant – nuclei of hyphae and spores are almost always haploid pheromones – contribute to genetic variation by attracting hyphae with different genes plasmogamy – the fusion of two cytoplasms from separate mycelia (heterokaryotic)
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This note was uploaded on 04/11/2008 for the course BIO 152 taught by Professor Mort during the Spring '08 term at Kansas.

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Chapter 31 - BIO 152 Notes Chapter 31 Fungi Concept 31.1...

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