________ that grow better at high CO2 concentra- tions are called capnophiles.
New cards
2
nutrient material
A(n) ________ prepared for the growth of microorganisms in a laboratory is called a culture medium.
New cards
3
Microaerophiles
________ are aerobic and require oxygen.
New cards
4
direct microscopic
In the method known as the ________ count, a mea- sured volume of a bacterial suspension is placed within a defined area on a microscope slide.
New cards
5
exact chemical composition
A chemically defined medium is one whose ________ is known.
New cards
6
visible colony
A(n) ________ theoretically arises from a single spore or vegetative cell or from a group of the same microorganisms attached to one another in clumps or chains.
New cards
7
Differential media
________ make it easier to distinguish colonies of the desired organism from other colonies growing on the same plate.
New cards
8
binary fission
Bacteria normally reproduce by ________.
New cards
9
Deep freezing
________ is a process in which a pure culture of microbes is placed in a suspending liquid and quick- frozen at temper- atures ranging from- 50°C to- 95°C.
New cards
10
Anaerobes
________ are bacteria that are unable to use molecular oxygen for energy- yielding reactions.
New cards
11
Organisms
________ that require oxygen to live are called obligate aerobes.
New cards
12
Aerotolerant anaerobes
________ are fermentative and can not use oxygen for growth, but they tolerate it fairly well.
New cards
13
freeze drying
During lyophilization (________), a suspension of microbes is quickly frozen at temperatures ranging from- 54°C to- 72°C, and the water is removed by a high vacuum (sublimation)
New cards
14
pure cultures
The isolation method most commonly used to get ________ is the streak plate method.
New cards
15
Essential organic compounds an organism
________ is unable to synthe- size are known as organic growth factors; they must be directly obtained from the environment.
New cards
16
Exponential growth stops
________ because the bacteria approach the carrying capacity, the number of organisms that an environment can support.
New cards
17
Microbes
________ require very small amounts of other mineral ele- ments, such as iron, copper, molybdenum, and zinc; these are referred to as trace elements.
New cards
18
Microbes
________ that are introduced into a culture medium to initiate growth are called an inoculum.
New cards
19
microbes
The ________ that grow and multiply in or on a culture medium are referred to as a culture.
Studied by 3 people
Note 
Flashcard (132)