Multiple Choice
Which of the following best describes the structure assembled on top of the cytoplasmic membrane in Gram-positive bacteria?
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1. Introduction to Microbiology
Introduction to Bacteria
Multiple Choice
In microbiology, are bacteria considered biotic or abiotic components of an ecosystem?
A
Abiotic, because bacteria are nonliving chemical factors like water and minerals.
B
Biotic, because bacteria are living organisms made of cells that carry out metabolism and reproduction.
C
Abiotic, because bacteria do not have DNA or cellular structure.
D
Neither biotic nor abiotic, because bacteria are viruses that require a host to replicate.
Verified step by step guidance1
Understand the definitions: Biotic components are living organisms in an ecosystem, while abiotic components are nonliving physical and chemical factors such as water, minerals, and temperature.
Recall the characteristics of bacteria: Bacteria are single-celled organisms that have cellular structures, contain DNA, and carry out metabolic processes and reproduction.
Compare bacteria to the definitions: Since bacteria are living organisms with cellular structure and metabolism, they fit the criteria for biotic components.
Evaluate the incorrect options: Bacteria are not abiotic because they are not nonliving chemical factors; they do have DNA and cellular structure, so those options are incorrect.
Conclude that bacteria are biotic components of an ecosystem because they are living organisms that interact with other biotic and abiotic factors.
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