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35 Cards in this Set
- Front
- Back
sterno-
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narrow ridge
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obligate
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necessary
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philo, philic
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lover, loving
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extreme
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very high or low
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eury-
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wide range
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facultative
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not necessary
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phobe, phobic
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fearer, fearing
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hyper-
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also extreme
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psychro-
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cold
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meso-
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middle
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thermo-
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hot
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acido-
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low pH
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alkai, baso
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high pH
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halo-
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salt
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essential nutrients
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nutrients that must be provided in form of elements or molecules
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macronutrients
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required in large quantities; play principle roles in cell structure & metabolism
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micronutrients/ trace elements
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required in small amounts; involved in enzyme function & maintenance of protein structure
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heterotroph
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an organism that must obtain carbon in ORGANIC form made by other living organisms such as proteins, carbohydrates, lipids, and nucleic acids
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autotroph
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an organism that uses CO2, an INORGANIC gas as its carbon source, not energy
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phototroph
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uses sunlight as energy source
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chemotroph
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uses chemicals as energy source
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Ex. of essential nutrients
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oxygen, nitrogen, hydrogen, phosphorus, sulfur, trace elements
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saprobes
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decompose dead organisms, recycle elements, release enzymes to digest materials
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parasites
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utilize tissue and fluids of a living host and cause harm
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-duric
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tolerant
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capnophile
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grows best at high CO2 tensions than normally present in the atmosphere
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barophiles
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deep sea microbes that livee under pressure many times higher than atmospheric pressure
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symbiotic
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a relationship is necessary
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nonsymbiotic
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free living organisms
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synergism
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members cooperate and share nutrients
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anatagonism
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some members are inhibited or destroyed by others
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continuous culture
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the organism are supplied with fresh nutrients and flushing off toxic products
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direct count
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under the microscope with a special slide or automated count with a Coulter counter or fow cytometer; flow cytometry can distinguish cell size and dead or living cells
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CFU (colony forming unit)
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colony coming from one cell
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cell mass
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measurement of the tubidity (mass of culture) of a culture with a spectrophotometer
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