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BESC 204 TAMU EXAM 1 QUESTIONS AND ANSWERS
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BESC 204 TAMU EXAM 1 QUESTIONS AND ANSWERS
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BESC 204 TAMU EXAM 1 QUESTIONSAND ANSWERS
fungi - Answer --own kingdom
-3 domains (archea,eukarya,eucaryota)
-eukaryotic
-heterotrophic
-no chlorophyll
-obtain nutrients by absorption
-reproduce by spores
-exhibit a pronounced polarization of growing cells
hyphae - Answer -each of the branching filaments that make up the mycelium
-elongate by tip growth
mycelium - Answer -vegetative part of a fungus, consisting of a network of fine white
filaments
-ex: fairy ring, ringworm etc.
-biggest one: 2200 acres;650tons;2400yearsold
septa - Answer --"cell compartmentalization"
-make fungi fundamentally different from other multi-cellular organisms
cell compartment - Answer --increases surface area of the cell membranes
-necessary for obtaining nutrients and excreting waste
-means of increasing membrane without increasing the size of the cell
-exceptions:yeast-single celled organsim
Chitin - Answer --in cell walls
-structural polymer of glucose
-plants = cellulose
-animals=no cell wall
Woronin Bodies - Answer --dense-core organelles that are found exclusively in
filamentous fungi
-seal septal pore in response to wounding (scab)
-consist of a membrane-bound protein matrix comprised of the HEX protein
, -formed from peroxisomes
Mycology - Answer -the study of fungi
mycologist - Answer -a scientist who studies fungi
morphological species concept - Answer --things that look the same are of the same
species
-must fungal species defined this way (particularly for species with no known sexual
reproduction)
Biological species concept - Answer --requires 2 individuals to be able to mate AND
produce viable offspring
-difficult with fungi b/c mating either doesn't work in lab or can be forced when it
wouldn't happen in nature
Phylogentic species concept - Answer --genealogical relationships
-genetic mapping and similarities
Zoospore - Answer --spore capable of swimming by means of a flagellum
-found in chytridiomycota
flagellum - Answer -tail-like structure that propels zoospore
whiplash flagellum - Answer -flagellum without hair on its surface
thallus - Answer -(hyphae>mycelium>thallus)
-simple structure that lacks specialized tissues typical of higher plants (stems, leaves,
etc.)
-coenocytic
coenocytic - Answer -mass of protoplasm containing many nuclei and enclosed by cell
wall
(no crosswalls)
Asexual (list spore types) - Answer -spores formed by the separation and thickening of
hyphal cells
-product of mitosis
-spore types:
*zoospores
*sporangiospores
*chlamydiospores
*conidia
Sexual (list steps) - Answer --products of meiosis
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