Bio Test chap 31 Flashcards
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| 341916386 | Fungi are _________ organisms. | chemoheterotrophic | |
| 341916387 | Parasitic fungi are responsible for about 80% of diseases that affect _______. | plants | |
| 341916388 | There is a fungus in Oregon that covers 890 hectares! The bulk of this fungus is most likely _____. | mycelium | |
| 341916389 | In fungi, the function of the mycelium is _____. | obtaining food | |
| 341916390 | Fungi that consist of a continuous mass containing hundreds or thousands of nuclei are known as _____. | coenocytic | |
| 341916391 | The hyphae of parasitic fungi that are modified to penetrate and absorb nutrients from host tissue are called _____. | haustoria | |
| 341916392 | You can buy micorrhizal fungus to add to soil when you plant trees and other plants. Why would you want to do this? | Mycorrhizal fungi assist plants in the absorption of essential nutrients. | |
| 341916393 | Which choice below generally represents the correct order of events in fungal sexual reproduction? | plasmogamy, karyogamy, meiosis, germination | |
| 341916394 | Which of the following statements about fungi is true? | The dominant stage of the life cycle is usually haploid. The haploid nuclei of dikaryotic hyphal cells fuse to form a diploid zygote. Many species obtain their nutrients from decaying organic matter. Spores germinate and then mitotically divide to form a mycelium. all of the above | |
| 341916395 | What role do pheromones play in fungal sexual reproduction? | Fungi use these chemical signals to determine whether a potential sexual partner is of a suitable mating type. | |
| 341916396 | Hyphae with two nuclei per cell are called _____. | dikaryotic | |
| 341916397 | During what stage of fungal reproduction are diploid cells produced? | karyogamy | |
| 341916398 | Fungal species are classified in a particular phylum based on _____. | the type of sexual structure they form | |
| 341916399 | Molecular evidence suggests that fungi _____. | and animals have a common ancestor | |
| 341916400 | In contrast to plants, the cell walls of fungi are composed of _____. | chitin | |
| 341916401 | Evidence that mycorrhizae, the mutualistic relationship between plants and fungi, existed from the beginning of the colonization of land comes from _________. | fossils | |
| 341916402 | Which feature below is unique to chytrids? | zoospores (flagellated spores) | |
| 341916403 | Which statement below about zygosporangia is true? | They are metabolically inactive. They are resistant to freezing and drying. They are multinucleate formations. They are produced through plasmogamy. all of the above | |
| 341916404 | What is the major feature of glomeromycetes? | arbuscules | |
| 341916405 | An ascus is _____. | a saclike structure containing spores | |
| 341916406 | The asexual spores produced by members of the phylum Ascomycota are called _____. | conidia | |
| 341916407 | The mushroom in a basidiomycete life cycle serves the same function as the _____ in the ascomycete life cycle, which is to _____. | ascocarp; scatter sexually produced spores | |
| 341916408 | While hiking through a forest, you discover a fungus growing on the remains of a decaying tree trunk. You hypothesize that it is a basidiomycete fungus because it resembles a mushroom in shape and size. If your logic is correct, microscopic analysis of the tissue found in the stalk of this fungus will reveal the presence of _____. | dikaryotic cells with haploid nuclei | |
| 341916409 | Fungi in the phylum Basidiomycota are the most important decomposers of wood because of their ability to break down _________. | lignin | |
| 341916410 | What is the importance of the extended dikaryotic stage in the life cycles of basidiomycetes and ascomycetes? | It allows for many genetic recombinations to occur. | |
| 341916411 | Where and when does fertilization occur in the mushroom life cycle? | in a mushroom, when the nuclei of a dikaryotic cell fuse | |
| 341916412 | Lichens are _____. | symbiotic associations of photosynthesizers and fungi | |
| 341916413 | Lichens are important pioneers in areas that have been burned by fires or destroyed by lava flows because _____. | they are important in the initial stages of soil formation | |
| 341916414 | A dramatic example of the pathogenicity of certain fungi is the virtual elimination of the American elm by _____. | an ascomycete | |
| 341916415 | Two of the most common mycoses (fungal infections) in humans are _________. | athlete's foot and yeast infections |