Acylhomoserine lactones used in quorum sensing regulate their own synthesis by an autoinduction system.
- Numerous bacteria use acyl homoserine lactones (acyl-HSLs), significant intercellular signaling molecules, to track the density of their population for quorum-sensing control of gene expression. The LuxI family of proteins produces the signals in question.
- A lot of proteobacteria use quorum-sensing signals from acyl-homoserine lactones.
- Cells create a baseline amount of signal at low population densities, and when enough signal has accumulated in the environment, it binds to its receptor and activates quorum-sensing-dependent genes.
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Answer:
Parasitic Relationship
Explanation:
Symbiotic relationship:
is a term that defines an interaction between organisms of different organisms.
Parasitic Relationship:
A relationship in which one organism is benefited and one is not.
Example: A tapeworm living at the gastrointestinal parts.
Mutualistic Relationship:
A relationship in which both organisms benefit.
Example: Egyptian plover bird and the crocodile.
Commensal Relationship:
A relationship in which both organisms are not benefited nor harmed.
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One example of how natural selection can change the distribution of a trait is the peppered moths during the industrial revolution. The moths were originally mainly white with a few black spots, however, when all the factories were built, the trees the peppered moths lived on turned a black color, causing ones who were mostly white to be picked off by predators, but the ones that were black with a few white spots survived and blended in better, leaving them to breed and produce more black-colored moths that would survive easily. This shows the changing of a trait because ones that used to be mostly white were killed, showing a shift in the trait pattern in favor to the black moths that now lived instead of the white moths. (Sorry its long)