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22 terms

Biology 31: Fungi

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absorption
fungi are heterotrophs that acquire their nutrients by
exoenzymes
powerful hydrolytic molecules secreted by fungus that digest food outside its body
saprobic
____ fungi absorb nutrients from nonliving organisms
parasitic
_____ fungi absorb nutrients from the cells of living hosts
mutualistic
_____ fungi absorb nutrients from a host, but they reciprocate with function that benefits their partner
hyphae
the tiny filaments that make up the vegetative bodies of most fungi
mycelium
a mat of interwoven hyphae
chitin
fungal hyphae have cell walls that are made up mainly of ____, a strong but flexible nitro-gen containing polysaccharide
septa
cross walls that divide hyphae of fungi into multiple cells
coenocytic
_____ fungi consist of a continuous cytoplasmic mass with hundreds of nuclei
karyogamy
fusion of haploid nuclei contributed by two parents
plasmogamy
cytoplasmic fusion of two parent cells
haustoria
parasitic fungi have modified hyphae that are nutrient absorbing and penetrate tissues of their host
chytrids
origin of fungi, aquatic, some saprobes, chitinous cell walls, flagellated zoospores
zygomycetes
terrestrial fungi, both asexual and sexual, hyphae are coenocytic
ascomycota
sac fungi that produce sexual spores, yeast to morels, variety of habitats
mycorrhizae
mutualistic associations of fungi with roots of plants, greatly increase absorptive surface of plant roots
basidiomycetes
club fungi have long-lived dikaryotic mycelia, transient diploid stage, decomposers of lignin, rusts and smuts destructive
lichens
symbiotic association of photosynthetic organisms in a mesh of fungal hyphae
glomeromycetes
fungi that form mychorrhizae
ethylene
plant hormone that causes fruit to ripen and stimulates fungal spores to germinate
mycosis
general term for a fungal infection, such as ringworm