Fungi Flashcards
(36 cards)
Are yeasts and molds prokaryotes or eukaryotes?
eukaryotes
What are yeasts and molds way of nutrition?
heterotrophic and some are saprophytic
What does heterotrophic mean?
must absorb carbon from environment (organic)
What does saprophytic mean?
obtain nutrients from dead, organic matter
Some fungi are _____.
pathogenic (mycoses)
What is the cell wall of yeasts and fungi made of?
chitin
What kind of environment do yeasts and fungi prefer?
low pH, high sugar concentration
What kind of nutrient medium is used to culture yeast and fungi?
Sabouraud Dextrose Agar
What are the characteristics of Sabouraud Dextrose Agar?
contains peptone, glucose and a low pH. (inhibits bacterial growth)
What are the three characteristics of yeast?
- unicellular 2. round (ovoid) 3. asexual reproduction (budding)
What are the three characteristics of mold?
- multicellular 2. filamentous-hyphae 3. sexual and asexual reproduction
What characteristic to yeast and mold share?
they are dimorphic
What does dimorphic mean?
They can switch forms due to environment
What is an example of a dimorphic microorganism?
Candida albacins
How is hyphae classified?
by function
What is vegetative hyphae?
grow laterally or underneath (rhizoid), absorb nutrients
What are reproductive hyphae?
grow vertically and give rise to spores
Hyphae can be ______ or _____.
septated or non-septated
What does septated mean?
hyphae are divided into compartments
What is the term for several hyphae?
mycelium
What are sporangiospores?
spores formed in a sac called a sporangium
What are conidiospores?
free spores not enclosed in a sac
What are the two types of asexual spores?
sporangiospores and conidiospores
What are the three types of sexual spores?
- ascospores 2. blastospores 3. zygospores
