Micro Exam 2b Flashcards
what are the different protozoans?
- amoeba, flagellates
- ciliates
- sporozoa, coccidia
- microsporidia
what are the different metazoans?
- flatworms
- flukes
- tapeworms
characteristics of fungi
- can both harm and benefit the human being
- classified by biochemical tests and physical appearance
- multicellular for the most part , minus yeast who are unicellular
- molds and fleshy fungi contain a thallus (body) composed of long filaments of cells joined by hyphae
- dimorphic
- reproduction occurs in both sexual and asexual forms via the formation of spores
- aerobic or facultatively anaerobic
- chemohetertrophs
septate hyphae
segmented molds
coenocytic hyphae
continuous molds
mycelium
large filamentous mass of hyphae
unicellular fungi’s way of division
- budding (asymmetrical)
- fission (symmetrical)
asexual spores
formed by hyphae and germinate to produce genetically identical daughter cells
- more common
- sporangiospores and conidiospores
sexual spores
result from fusion of nuclei from 2 opposite mating strains of same species and result in genetically diverse daughter cells
mycosis
fungal infection
dimorphism
pathogenic fungi that contain this quality are yeastlike at 37 degrees Celsius and mold like at 25 degree Celsius
intermediate host
host that harbors the asexually reproducing stage of an organism
definitive host
host that harbors the sexually reproducing stage of an organism
two advantages of fungi
- can help in production of foods
- used for biological control of pests
two disadvantages of fungi
- cause food spoilage
- can cause disease in plants