In the process of ________, microbes detect the presence and density of other microbes and modify their metabolic activity in response.
A. quorum sensing
B. antagonism
C. mutualism
D. symbiosis
E. synergy
Answer: A
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If multiple fragments from a genome have been cloned into bacteria, how can a researcher identify the
bacteria that contains the particular sequence they are interested in?
a. The bacteria containing the gene of interest are antibiotic resistant and unable to digest Xgal. b. The DNA purified from individual colonies of bacteria is probed with a short, single stranded DNA fragment that is complementary to the gene of interest. c. The scientists have to sequence all of the DNA from all of the white bacterial colonies; fortunately computers let us automate this process. d. The scientists have to sequence all of the DNA from all of the blue bacterial colonies; fortunately computers let us automate this process. e. We have to isolate the DNA of interest before transforming it into the bacteria. That is the only way to know which bacteria have the DNA of interest.
Species interactions between members of a community include __________ and __________, in
which one species benefits at the expense of another. Fill in the blank(s) with the appropriate word(s).
Mucus production that blocks ducts of certain glands and lung passages is a symptom of ____________________. What will be an ideal response?
When cells are not responding to normal controls over growth and division, they form a tissue mass known as a _____________.
A. metastasis B. malignancy C. tumor D. carcinogen E. nucleosome