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Biology 123 fungi
cal poly
| Question | Answer |
|---|---|
| how do fungi feed? | absorption |
| how are food substances brown down? | externally |
| how do fungi absorb their food? | through its body |
| based on the feeding style of fungi, what can they be classified as? | Saprophytes, parasites and mutualists |
| how do Saprophytes fungi feed? | feed on dead organisms and wastes |
| how do fungi parasites feed? | feed on living organisms |
| how do mutualists feed? | absorb nutrients from a living host organism, but they provide other nutrients to the host in return |
| which fungi is unicellular? | yeasts |
| multicellular fungi cells form _______ | filamentous tissues -strands of cells are called hyphae |
| what are fungi cell wall composed of? | polysaccharide chitin |
| what are septate fungi? | fungi that have cells surrounded by a cell wall on all sides |
| hyphae that lacks cell wall between adjacent cells lead to _______ | continuous strand of cytoplasm |
| hyphae that lacks cell walls are termed _______ | a separate, coenocytie, or multinucleate |
| what is mycelium? | network of tightly interwoven hyphal tissues |
| the majority of the fungus exists where? | below the ground |
| the mycelium is what part of the fungus? | feeding part |
| how does mycelium grow? | spreading outward at tips |
| what is the above structure of the fungus for? | reproduction |
| fruiting bodies | hyphae densely packed together |
| how does yeasts reproduce? | by budding |
| multicellular fungi asexually reproduce by ______ | unicellular spores by mitosis |
| unicellular spores by mitosis is called | conidia |
| conidia is produced and held on _________ | Conidiophores |
| conidia is released from _______ and dispersed by ______. | conidiophores, wind |
| what do conidiophores become? | a new genetically-identical fungus if they land in a optimal location |
| molds exhibit __________ | mostly asexual reproduction |
| molds are | -mats of mycelia with many conidiophores -no fruiting bodies (since no sexual reproduction) |
| the only diploid stage of fungus life cycle is the _______. | zygote |
| fungi do not possess ___________ | an alternation of generations life cycle |
| what part of the fungus is typically haploid? | the fungal hyphae |
| plasmogamy | haploid hyphae of 2 different fungi fuse their cytoplasms but don't fuse nuclei |
| plasmogamy results in __________ | a heterokarytic state -not n or 2n but its n + n |
| karyogamy | nuclei of hyphae fuse |
| fertilization consists of | plasmogamy and karyogamy |
| the zygotes that result from karyogamy immediately undergo ________ | meiosis |
| meiosis produces _______ | spores |
| where does spore production occur? | fruiting bodies |
| spores dispersed by ______ and grow into a __________ | wind, a genetically-distinct fungus |
| difference b/w sexually and asexually reproduced spores is _________. | sexually-become genetically-distinct fungus asexually- become genetically-identical fungus |
| along w/ prokaryotes, fungi are major _____ of terrestrial ecosystems. | decomposers |
| chemical recyclers | -break down organic matter -return inorganic nutrients to soil |
| fungi can break down _________ while most eukaryotes cannot | cellulose and ligin |
| two common mutualistic symbiotic relationships | mycorrihizae |
Created by:
sncalderon
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