fungi

Question 1

what are the general characteristics of fungi

Answer 1

heterotrophic; decomposition of organic matter

eukaryotic

Question 2

describe fungi structure

Answer 2

many filamentous hypha growths known as hyphae
septa walls across hypha
apicial growth

Question 3

how are fungi classified

Answer 3

yeast (single celled) vs dimorphic (yeast phase then hyphal phase)
tru fungi vs oomycetes (algae which are heterotrophic eukaryotes with filamentous growth)

Question 4

what defines a true fungi

Answer 4

glycogen as a stroage compound
haploid nucleus
often several nucei per hyphae compartment
chitin cell wall
glycoproteins anchored in cell wall

Question 5

how do fungi reproduce

Answer 5

many can reproduce both sexually and asexually

sexual reproduction is done under favourable conditions

Question 6

how many fungi species have been described? how mnay are estimated to exist

Answer 6

100,000 described
1.5 million estimate
10% known

Question 7

what is the duel nomenclature

Answer 7

one name for sexual structures one for asexual structures

Question 8

what are the 3 groups of true fungi

Answer 8

1-chytridomycota; primitive; in rumen; rhizoids rather than hyphae;zoospores; frog disease
2-mucoromycota; mycorrhizae
3-dikarya; advance
a-ascomycota; s.cerevisae/thrush
b-basidomycota;mushrooms;2 nuclei per cell; rust

Question 9

discuss the life cycle of s. cerevisae

Answer 9

hapoid/diploid
haploid are either alpha or a; mate with other type by pharomones with cause projections to grow allowing fusion
budding