BIOL 203 MICROBIOLOGY LCC
CERTIFICATION EVALUATION COMPLETE
QUESTIONS AND ANSWERS GRADED A
PLUS
●● Anaerobe
Answer: any organism that is able to live without oxygen
●● binary fission
Answer: A form of asexual reproduction in single-celled organisms by
which one cell divides into two cells of the same size
●● Chemotrophs
Answer: Organisms that get energy from chemicals taken from the
environment
●● doubling time
Answer: the time required for a population to double in size
●● generation time
Answer: the time it takes for a population to double
,●● Heterotroph
Answer: organism that obtains energy from the foods it consumes; also
called a consumer
●● Hypotonic
Answer: when comparing two solutions, the solution with the lesser
concentration of solutes
●● log phase
Answer: The period of exponential growth of bacterial population.
●● Niche
Answer: An organism's particular role in an ecosystem, or how it makes
its living.
●● Parasites
Answer: An organism that lives in or on another organism, deriving
nourishment at the expense of its host, usually without killing it
●● stationary phase
Answer: rate of cell growth equals rate of cell death caused by depleted
nutrients and O2, excretion of organic acids and pollutants
, ●● Photoautotrophs
Answer: An organism that harnesses light energy to drive the synthesis
of organic compounds from carbon dioxide.
●● Chemoheterotrophs
Answer: An organism that must consume organic molecules for both
energy and carbon.
●● Aerobe
Answer: any organism that uses oxygen for respiration
●● Autotroph
Answer: Organisms that make their own food
●● Capnophiles
Answer: Microbes that require high CO2 conditions
●● Commensalism
Answer: A relationship between two organisms in which one organism
benefits and the other is unaffected
●● growth curve
Answer: graph that plots the number in a population over time
CERTIFICATION EVALUATION COMPLETE
QUESTIONS AND ANSWERS GRADED A
PLUS
●● Anaerobe
Answer: any organism that is able to live without oxygen
●● binary fission
Answer: A form of asexual reproduction in single-celled organisms by
which one cell divides into two cells of the same size
●● Chemotrophs
Answer: Organisms that get energy from chemicals taken from the
environment
●● doubling time
Answer: the time required for a population to double in size
●● generation time
Answer: the time it takes for a population to double
,●● Heterotroph
Answer: organism that obtains energy from the foods it consumes; also
called a consumer
●● Hypotonic
Answer: when comparing two solutions, the solution with the lesser
concentration of solutes
●● log phase
Answer: The period of exponential growth of bacterial population.
●● Niche
Answer: An organism's particular role in an ecosystem, or how it makes
its living.
●● Parasites
Answer: An organism that lives in or on another organism, deriving
nourishment at the expense of its host, usually without killing it
●● stationary phase
Answer: rate of cell growth equals rate of cell death caused by depleted
nutrients and O2, excretion of organic acids and pollutants
, ●● Photoautotrophs
Answer: An organism that harnesses light energy to drive the synthesis
of organic compounds from carbon dioxide.
●● Chemoheterotrophs
Answer: An organism that must consume organic molecules for both
energy and carbon.
●● Aerobe
Answer: any organism that uses oxygen for respiration
●● Autotroph
Answer: Organisms that make their own food
●● Capnophiles
Answer: Microbes that require high CO2 conditions
●● Commensalism
Answer: A relationship between two organisms in which one organism
benefits and the other is unaffected
●● growth curve
Answer: graph that plots the number in a population over time
