Lecture 26 - Fungi Flashcards Preview

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Flashcards in Lecture 26 - Fungi Deck (24):
1

Are fungi more closely related to plants or animals?

animals

2

Are fungi heterotrophic or autotrophic?

heterotrophic

3

How do fungi acquire food?

through absorption using exoenzymes

4

What are fungi composed of?

hyphae

5

What do hyphae form/

mycelium

6

What are two "forms" of fungi?

-can have septa dividing cells and truly be multicellular
-coenocytic with one cytoplasm and many nuclei

7

What are 3 forms of fungal nutrition?

1. parasitic
2. mutualistic (mycorrhizae or lichens)
3. decomposers

8

How are fungi parasitic?

-can use penetrating mycelium or historia in order to take nutrients from hosts

9

What are 4 forms of fungal life?

1. molds
2. yeast
3. lichens
4. mycorrhizae

10

What are molds?

-asexual
-rapidly growing

11

What are yeasts?

-unicellular fungi in moist environments
-includes imperfect fungi (only is asexual)

12

What are lichens?

-symbiotic relationship between fungi + photosynthetic microorganisms
-live in extreme environments

13

What are mycorrhizae?

-symbiotic relationship between plants
-fungi increase increase SA on plant roots

14

What is the first step of the sexual phase?

-two parent mycelium fuse together without nuclei
-combining plasmogamy
-leads to heterokaryotic stage

15

What is the second step of the sexual phase?

-parent nuclei combine Karogamy

16

What is the third step of the sexual phase?

-goes through meiosis
-creates spore producing structures (haploid)
-can germinate to form mycelium

17

What happens in the asexual stage?

-mycelium can produce spore producing structures that can germinate and continue to be haploid

18

Chytridiomycota

-flagellated zoospores
-most closely related to protists
-causes devastating disease in amphibeans

19

Zygomycota

Zygote fungi form resistant structures during sexual reproduction

20

Glomeromycota

all species are mycorrhizal

21

Ascomycota

Classified by long heterokaryotic phase with ascocarp

22

Basidiomycota

mushrooms, shelf fungi, puffballs, super long dikaryotic phase

23

How does most yeast reproduction occur?

budding

24

Saprobic fungi

absorb nutrients form nonliving organisms