Multiple Choice
Organisms that use CO2 as their source of carbon are called
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26. Prokaryotes
Prokaryotic Metabolism
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Organisms that require oxygen for metabolism are referred to as…
A
Facultative aerobes.
B
Obligate aerobes.
C
Facultative anaerobes.
D
Microaerophiles.
Verified step by step guidance1
Understand the terminology: 'aerobes' refers to organisms that use oxygen for metabolism.
Differentiate between the types of aerobes: 'Obligate aerobes' require oxygen for survival, while 'facultative aerobes' can use oxygen but can also survive without it.
Recognize that 'facultative anaerobes' can survive with or without oxygen, but they do not require it for metabolism.
Identify 'microaerophiles' as organisms that require oxygen but at lower concentrations than are present in the atmosphere.
Conclude that organisms requiring oxygen for metabolism are specifically 'obligate aerobes', as they cannot survive without oxygen.
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