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BIO 117 Exam 2 WVU Barry with 100- correct answers(verified for accuracy)
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BIO 117 Exam 2 WVU Barry with 100- correct answers(verified for accuracy)
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BIO 117 Exam 2 WVU Barrywith 100% correct
answers(verified for accuracy)
sexual fungal reproduction - answer 1. plasmogamy
2. heterokaryotic mycelium
3. karyogamy
heterokaryotic mycelium - answer cells contain 2 haploid nuclei
from parent (n+n)
karyogamy - answer fusion of nuclei from parents (2n)
three domains of life - answer bacteria, archaea, eukarya
methods of gene exchange for bacteria - answer 1. transformation
2. conjugation
3. transduction
transduction - answer -viruses/bacteriophages help to pass genetic
information
-required initial virus to be successful then a later virus to be
unsuccesful
-virus acts as intermediary
conjugation - answer -direct contact and DNA sharing between
cells
,-pili structures - formation of a tunnel between 2 cells so DNA can
pass
transformation - answer -DNA from environment is taken in and
used
-useful in DNA technology
phototrophs - answer source of energy is sunlight
chemoorganotrophs - answer source of energy:
- organic molecules
chemolithotrophs - answer source of energy:
- inorganic molecules
autotrophs - answer source of C-C bonds:
- self-synthesized from CO2, CH4, or other simple molecules
heterotrophs - answer source of C-C bonds:
- from molecules produced by other organisms
extremophiles - answer bacteria/archeae that live in extreme
habitats:
-hydrothermal vents
-acidic conditions (pH < 1)
-under antarctic ice
-water 5-10 times saltier than seawater
food produced by bacteria - answer - vinegar- acetic acid bacteria
, - Limburger cheese- brevibacterium
- pickles, sauerkraut, yogurt- lactic acid-fermentation
Why study protists? - answer -critical to understand evolution of
plants, fungi, animals
-impact on human health welfare
-ecological imp
According to this phylogenetic tree the entirety of protist form a
______ group. - answer
Why are "protists" a ________ group ? - answer
what evolved in protists - answer earliest euk single celled
organism w/
-mitochondria
-nucleus w endomembrane syst
-cytoskeleton
-no cell wall.
endomembrane system - answer organelles w similar membrane
structures; can pass things among themselves easily
endosymbiosis theory - answer mitoch. originated when bac cell
engulfed by host cell
protists - answer -eukaryotic
-paraphyletic group
-uni/multicellular
-auto/heteotropic
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