Chapter 34 Flashcards
The network of branching filaments that form the main body of a multicellular fungus is the:
mycelium.
The stage of the fungal life cycle where two or more genetically distinct nuclei are found in the same cell is referred to as:
heterokaryotic stage.
The black spots seen on a moldy piece of bread are which part of a zygomycete?
the sporangia
Which of the following statements most accurately describes the anatomy of a multicellular fungus?
Numerous hyphae make up a mycelium.
When you eat a mushroom, what part of the fungus are you consuming?
a reproductive structure
Which of the following statements comparing fungal and animal nutrition is correct?
Fungi digest and then absorb food, whereas animals ingest and then digest food.
Which of the following is not a benefit of spore production in fungi?
Because spores have a high rate of survivability, fungi typically produce a small number of spores, thereby saving energy and resources.
Where are the basidia located in a typical toadstool?
lining the gills
Fungi are the most important decomposers of wood in the ecosystem.
true
Why do fungi produce fruiting bodies?
to enhance spore dispersal
Which of the following fungal groups is the cause of widespread mortality in amphibians?
chytrids
If a fungus encountered a particularly rich food source, what would be the expected result?
Hyphae would branch and extend rapidly to form a mycelium.
What is the primary advantage of having multiple mating type alleles?
There is an increased probability that an encounter between two fungi will involve compatible mating types.
Which of the following groups of fungi is the most diverse?
ascomycetes
Within the fungal body, nutrients are transported from the ___ to the ___ by the process of ___?
mycelium; fruiting body; bulk flow
Why do fungi produce fruiting bodies?
to enhance spore dispersal
Which of the following groups of fungi are found exclusively in association with plant roots?
glomeromycetes
Which of the following statements about lichens is incorrect?
Lichens are symbiotic relationships between fungi and plants
How is karyogamy different from plasmogamy?
Karyogamy is the fusion of nuclei, whereas plasmogamy is the fusion of cytoplasm.
Developing truffles produce a chemical that attracts what kind of organism for spore dispersal?
pigs
As fungal hyphae make the transition from a non-growing state to an actively growing and exploring state, what changes would be expected in the cells?
Water would move in and the turgor pressure would increase
How are the spores of zygomycetes such as Rhizopus dispersed?
by the wind
In many groups of fungi, karyogamy and plasmogamy are separated in time and space. One potential advantage of this arrangement is that:
mating and spore production can occur in different environments.
How are the zygote and the dikaryotic stages of a fungal life cycle related?
The dikaryotic stage gives rise to the zygote through karyogamy.
Which of the following statements about basidiomycetes and ascomycetes is incorrect?
Basidiomycetes have a short heterokaryotic stage, whereas ascomycetes have a long heterokaryotic stage.
Which of the following represents the correct sequence of events in parasexual reproduction?
plasmogamy, karyogamy, mitotic recombination, chromosome loss
Which of the following most accurately describes spore production in ascomycetes?
Within each ascus, the zygote undergoes meiosis followed by mitosis to produce eight spores.
Which of the following statements about spores is incorrect?
