Ch 24

Question 1

True or false: most fungi are multicellular and terrestrial?

Answer 1

True

Question 2

Many chrytrids are

Answer 2

aquatic

Question 3

Main fungus body

Answer 3

mycelium. network of filamentous (thread-like) hyphae. underground and not seen

Question 4

Hyphae are made of tubular cells with rigid cell walls containing _____;

Answer 4

chitin. contain ergosterol. septate (cross walls) or coenocytic (common cytoplasm)

Question 5

How do hyphae feed?

Answer 5

absorptive hetereoptrophs.

Question 6

Rapid growth at

Answer 6

hyphen tips toward new food

Question 7

appressoria

Answer 7

how hyphae force their way into plants. specialized cells with penetration peg. extremely strong (bULLETPROOF)

Question 8

Haustoria

Answer 8

specialized hyphae: penetrates cell walls of host plant without killing

Question 9

Are spores asexual or sexually made?

Answer 9

both

Question 10

are spores haploid or diploid

Answer 10

haploid, grow into haploid mycelium

Question 11

budding

Answer 11

single cell Yeasts, mitosis and asymmetric cytoplasmic division

Question 12

does fungi have genders?

Answer 12

no. have mating types instead

Question 13

3 steps to form a zygotes:

Answer 13

1. plasmogamy: fusion of haploid (+ )and hyphae( -)
2. heterokaryotic stage: hyphae with unfused haploid nuclei of both types
3. karyogamy: fusion of haploid nuclei to form zygote 2n

Question 14

Origin of fungi

Answer 14

OPISTHOKONTS, land invasion probs

Question 15

5 types of fungi

Answer 15

chytrids, zygomycetes, glomoeromycetes, ascomycetes, basidiomycetes

Question 16

Chytrids:

Answer 16

flagellated spores (zoospores)

Question 17

Zygomycetes

Answer 17

resistant zygosporangium, help survive harsh conditions

Question 18

Glomeromycetes

Answer 18

mutualistic arbuscualr mycorrhizae: beneficial relationship between plants and fungi

Question 19

Asocmycetes

Answer 19

Sexual spores within sac-like ascus

Question 20

Basidiomycetes

Answer 20

sexual spores within club like basidium. mushrooms

Question 21

Ectomycorrhizae meaning

Answer 21

mutualists association: fungus remains outside root and between cells

Question 22

Endomycorrhizae

Answer 22

fungi penetrates cell walls and form haustoria.

Question 23

mycosis

Answer 23

infection due to fungus