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Your favorite tree is dying, and you find that there is a fungal infection on its leaves. If you were to look at the cells of the infected leaves of your tree, which structure(s) would you expect to find?


A) mycorrhizae
B) arbuscules
C) haustoria
D) both mycorrhizae and arbuscules
E) both mycorrhizae and haustoria

F) A) and E)
G) A) and B)

Correct Answer

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Reproduction in mucoromycetes is typically ____ via spores that form ____.


A) sexual; in sporangia
B) asexual; at the tips of hyphae
C) sexual; at the tips of hyphae
D) asexual; in sporangia
E) asexual; both in sporangia and at the tips of hyphae

F) B) and C)
G) D) and E)

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Having aseptate hyphae, members of the phylum ____ are described as coenocytic since they have numerous nuclei in a common cytoplasm.


A) Mucoromycota
B) Basidiomycota
C) Chytridiomycota
D) Microsporidia
E) Ascomycota

F) A) and B)
G) C) and D)

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The substance that typically provides rigidity to fungal cell walls, and is also found in the external skeletons of insects and other arthropods, is called ____.


A) lignin
B) cellulose
C) starch
D) collagen
E) chitin

F) A) and B)
G) A) and C)

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Fungi were present on land at least 500 million years ago.

A) True
B) False

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Match the term with its corresponding definition.

Premises
initial sexual stage in which the cytoplasms of two mating types fuse
second phase of fertilization in which the nuclei in the dikaryotic cell fuse to make a 2 n zygote nucleus
asexual stage of many multicellular fungi
asexual spores produced by many ascomycetes and some basidiomycetes
Responses
plasmogamy
conidia
karyogamy
mold

Correct Answer

initial sexual stage in which the cytoplasms of two mating types fuse
second phase of fertilization in which the nuclei in the dikaryotic cell fuse to make a 2 n zygote nucleus
asexual stage of many multicellular fungi
asexual spores produced by many ascomycetes and some basidiomycetes

The fusion of the cytoplasms of two genetically different cells is known as ____.


A) osmosis
B) karyogamy
C) cytoplasmic streaming
D) plasmogamy
E) mutual symbiosis

F) C) and D)
G) A) and C)

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In a mycorrhizal association, the fungus benefits mainly by ____.


A) absorbing water from the plant
B) using the plant roots as a growth surface
C) absorbing mineral ions from the plant
D) providing water to the plant
E) absorbing carbohydrates from the plant

F) C) and D)
G) A) and E)

Correct Answer

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Answer the questions using the accompanying figure. Examine the fungal hyphae structures. Match each letter with the form or part represents. Answer the questions using the accompanying figure. Examine the fungal hyphae structures. Match each letter with the form or part represents.      Figure 30.1 Figure 30.1

Premises
nuclei
septa
cell walls
coenocytic hypha
septate hypha
Responses
A
D
C
B
E

Correct Answer

nuclei
septa
cell walls
coenocytic hypha
septate hypha

A cell cluster with both algal and hyphal cells that is used for asexual reproduction in lichens is called a(n) ____.


A) soredium
B) arbuscule
C) thallus
D) sporangium
E) haustorium

F) A) and C)
G) A) and E)

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Ramalina lichens are damaged by nitrates.

A) True
B) False

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The mushroom structure of a fungus usually represents a small fraction of the organism's total mass.

A) True
B) False

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The tough, pliable body of a lichen is called a(n) ____.


A) soredium
B) arbuscule
C) thallus
D) sporangium
E) haustorium

F) C) and D)
G) A) and B)

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The first fungi were most likely ____.


A) airborne
B) terrestrial
C) arboreal
D) aquatic
E) amphibious

F) B) and E)
G) C) and D)

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Fungi generally digest large organic molecules ____.


A) in special compartments called arbuscules
B) within feeding hyphae
C) in visible mushrooms
D) in special compartments called haustoria
E) outside of their cells

F) B) and D)
G) A) and D)

Correct Answer

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All fungi can reproduce via ____.


A) asci
B) pollen
C) spores
D) conidia
E) basidia

F) D) and E)
G) All of the above

Correct Answer

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Old man's beard ( Usnea trichodea ) and yellow Evernia lichens are sensitive to elevated levels of ____.


A) sulfur dioxide
B) nitrogen oxides
C) nitrate
D) sunlight
E) fluoride salts

F) None of the above
G) C) and D)

Correct Answer

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The general term for a state in which two or more species live together in close association is ____.


A) commensalism
B) parasitism
C) mutualism
D) predation
E) symbiosis

F) None of the above
G) A) and B)

Correct Answer

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Production of sexual spores in basidiomycetes occurs on ____.


A) basidia
B) conidiophores
C) sporangia
D) asci
E) zygospores

F) B) and C)
G) C) and D)

Correct Answer

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The toxin found in Amanita phalloides has deadly effects on humans because it inhibits ____.


A) DNA replication
B) RNA polymerase
C) peptide bond formation
D) muscle contraction
E) active transport

F) A) and B)
G) D) and E)

Correct Answer

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