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The Kingdom Fungi
Section 211
This section describes thedefining characteristics of fungi.It also describes the internal
structure of a fungus andexplains how fungi reproduce.
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What Are Fungi?
Circle the letter of each sentencethat is true about fungi.
They are heterotrophs.
They have cell walls.
They are eukaryotic.
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Structure and Function ofFungi
The cell walls of fungi are
made of a complexcarbohydrate called
______.
chitin
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Structure and Function ofFungi
How do fungi digest their food?
They digest food outside theirbodies and then absorb it.
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Structure and Function ofFungi
Is the following sentence true orfalse?
Some fungi are parasites.
true
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Structure and Function ofFungi
Which group of fungi are notmulticellular?
Yeasts
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Structure and Function ofFungi
What are hyphae?
They are the tiny filaments thatcompose multicellular fungi.
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Structure and Function ofFungi
How thick is each hypha?
Each hypha is one cell thick.
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Structure and Function ofFungi
In some fungi, what divides thehyphae into cells containing oneor two nuclei?
Cross walls
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Structure and Function ofFungi
What is a mycelium?
A mycelium is a thick mass ofmany hyphae tangled together. Itcomposes the body of a
multicellular fungus.
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Structure and Function ofFungi
Why is a mycelium well suited toabsorb food?
It permits a large surface area to
come in contact with the foodsource through which it grows.
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Structure and Function ofFungi
What is a fruiting body of a fungus?
It is a reproductive structure growingfrom the mycelium in the soilbeneath it.
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Structure and Function ofFungi
What is a fairy ring, and why doesit form?
A fairy ring is composed of the fruitingbodies of mushrooms that developed atthe outer edges of a single mycelium. It
forms because as time goes by soilnutrients near the center of the myceliumbecome depleted and mushrooms sproutonly at the edges.
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Structure and Function ofFungi
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Reproduction of Fungi
How does asexual reproduction occurin fungi?
It takes place when cells or hyphaebreak off from a fungus and begin togrow on their own. Some fungi also
produce spores, which can scatterand grow into new organisms.
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Reproduction of Fungi
In some fungi, spores are
produced in structures called.
Sporangia
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Reproduction of Fungi
Where are sporangia found in
a fungus?
They are found at the tips of
specialized hyphae calledsporangiophores.
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Reproduction of Fungi
Sexual reproduction in fungi
usually involves two different.
Mating types
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Reproduction of Fungi
What is a gametangium?
It is a structure in a fungusthat forms gametes.
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Reproduction of Fungi
How does a zygote form in fungal
sexual reproduction? When the hyphae of opposite
mating types meet, their twogametangia join, and the haploid
nuclei contained in them fuse toform a diploid nucleus, or zygote.
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Reproduction of Fungi
Circle the letter of each sentence that is trueabout sexual reproduction in fungi.
The zygote is often the only diploidcell in the funguss entire life cycle.
Gametes of both mating types are
about the same size.
One mating type is a + (plus) andthe other is a (minus).
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How Fungi Spread
Is the following sentence true or false?
The spores of many fungiscatter easily in the wind.
True
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How Fungi Spread
For a fungal spore to grow,where must it land?
It must land in a favorable
environment where there is aproper combination of
temperature moisture and