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305 exam2 #1
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37
Biology
Undergraduate 3
09/24/2013

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Term
microbes are the -- of biosphere which means--
Definition
foundation of biosphere
at bottom of life and supply a ton of stuff that allows everything else to live
Term
microbes affect/influence/develop environment for
Definition
plants and animals
Term
Microbes recyle --
Definition
Recycle organic material
Breakdown
Term
ecology=
Definition
environment and different species of microbes in the environment
Term
involved in nutrient cycling between:
Definition
cycling between inorganic and organic cmpds.
Term
example of nutrient cycling:
Definition
Rocks aren’t usable for living things but microbes (bacteria) are involved in making things like rocks usuable for the rest of us.
Term
Ecosytem=
Definition
(multiple) species + environment
Term
Two keys for every environment we discuss
Definition
1. why are microbes there?
2. Nothing in real environment is in a pure culture/isolated/ always interacting
Term
Microbes must be able to use -- present in environment meaning --
Definition
Whatever
at least on microbe can use any given molecule (metabolism)
Term
Why are certain microbes found in some but not all places?
Definition
Ideal temps, salt, pH, found a niche (nutrients vs competiton), Genome- use of O2, nutrient req,
Term
Biomass=
organic material=
Definition
living organisms
all organic material- CHPN macromolecules
Term
-- organisms participate in food webs
Food web-
Definition
All
Energy (atp cycling) and materials (organic /inorganic for biomass)
Term
Trophic levels:
Definition
nutrient consumption
Term
Assimilation:
Definition
Acquire all elements to build into cells (anabolism=biosynthesis)
Growing cells need carbon
Term
Dissimilation:
Definition
breakdown of organc nutrients to inorganics (catabolism)
Term
Primary producers-
2 jobs-
-troph
Definition
absorb outside energy
assimilate inorganics into biomass
photo auto troph
Term
Ex of photoautotrophs
Definition
cyanobacteria- anabaena spiroides or prochloroccus
Term
consumers are -troph
3 types:
Definition
chemo hetero troph
Grazers
predators
decomposers
Term
Example of grazer:
Definition
protists (euk) viruses (phage)
Term
At every level of energy you only get -% of biomass formed. What happens to the -%?
Definition
10%
90% energy is lost as heat- ETC and forming CO2 from producer to consumers
Term
Relationships (interactions= symbiosis) between members of different species are either-
Definition
positive or negative
Term
Three classes of Symbiosis
Definition
mutalism
commensalism
parasitism
Term
Mutualism-
Definition
both need one another
good thing
one dies w/out other
Term
Commensalism
Definition
one species benefits other is neutral
Term
Parasitism
Definition
one species benefits harming the other
Term
Termite gut has what type of symbiosis?
Definition
Term
Protist inside terminte gut?
Definition
mixotricha paradoxa
Term
Releationship between protist and termite is called
Definition
syntrophy (eating together)
Term
Mixotricha paradoxa has what other microbes?
Definition
spirochetes
anchor bacteria
bacterial endosymbionts
vestigial endosymbionts
Term
Spirochetes in mixotricha paradox are:
Definition
large and small
help with motility and move protist around protist gut
Term
Anchro bacteria:
Definition
unknown function. sit on outside of protist
Term
bacterial endosymbionts
Definition
digest cellulose
cannot survive outside the protists
Term
Vestigial endosymbionts
Definition
"organelles" lost even more function than endosymbionts
Term
bacterial endosymbionts digest wood/cellulse to form-- which is absorbed by --
overall eqn:
Definition
acids= formic, lactic acid, acetic
termite, benifit
Cellulse-> H2 +CO2
Term
Where are methanogens?
Definition
outside protist/inside gut
Term
Methanogens take - from - and turn it into -
Definition
CO2 +H2 from protist->CH4
Term
What does the termite do with acetate?
Definition
Krebs cycle linked with respiration
Termite can get ATP from acetate -> CO2
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