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Explain why the evolution of resistance to antibiotics in bacteria is an example of directional natural selection?
All bacteria, as are all organisms, are variants and some of these variants are resistant to antibiotics. So, a population of bacteria, in their immediate environment, are subjected to an antibiotic and most succumb. So, the resistant, survive the onslaught ( are naturally selected ) and reproduce progeny that are also resistant to the antibiotic. So, allele frequency shifts and evolution occurs die to the adaptive change conferred on the progeny population by natural selection.
Are antibiotics universal and explain?
Colloidal silver is a universal antibiotic. It kills over 650 different bacteria.
What is evolution and can you provide an example to explain the term?
Evolution is the process by which living organisms change and adapt over time through natural selection. An example of evolution is the development of antibiotic resistance in bacteria. When exposed to antibiotics, only the bacteria with genetic mutations that make them resistant survive and reproduce, leading to a population of bacteria that is mostly resistant to the antibiotic.
How could you explain the increase of infection in hospitals by antibiotic-resistance bacterial?
The increase in infections in hospitals due to antibiotic-resistant bacteria is primarily caused by overuse and misuse of antibiotics. This leads to the development of resistant strains that are difficult to treat with conventional antibiotics. In hospitals, where patients with weakened immune systems are concentrated, these resistant bacteria can spread easily, leading to outbreaks of infections that are challenging to control.
Explain how the excessive or inappropriate use of antibiotics poses a health hazards for human population?
Antibiotics are substances which kill or inhibit bacteria. The problem lies in the fact that bacteria tend to have fairly high mutation rates. These mutation rates yield some bacteria which are more resistant to the antibiotics than other bacteria. Since you have used an antibiotic to destroy all other bacteria in a person, the resistant bacteria is free to spread as much as it can, since the antibiotic used won't kill it. If this is the case, then the person would have to get a different, more appropriate antibiotic to kill the bacteria. In some cases, this can be done multiple times, and you end up with a super-bacteria called multi-antibiotic resistant bacteria. As use of antibiotics spread, so do strains of these MAR bacteria, which are much more deadly than their relatives So what can be done? First, use antibiotics less. Studies show that they are over-prescribed. Second, ensure that the proper antibiotic is prescribed. In some cases, an antibiotic which is incorrect for the job to be done is one of the culprits.
Why should antibiotics should not be overused explain in brief.?
The more antibiotics are used, the more likely it is for antibiotic resistant organisms to appear. explain briefly but why Bhavishya
Are there any populations in the food web that could be changed without affecting other populations explain?
poplations in the food web that could be changed without affecting other populations explain
Explain how natural selection can give rive to a population of antibiotic resistant bacteria?
Consider the following scenario: An antibiotic is applied to a petri dish of bacteria. The antibiotic will kill of most of the bacteria, but some will remain that are immune to the antibiotic. Therefore, only the immune bacteria will reproduce. Soon, the whole petri dish will be full of bacteria that is immune to the antibiotic. Nature "selects" the immune bacteria for survival.
Explain the mode of action of Betalactam antibiotics on susceptible bacteria?
The cell wall of bacteria is made peptidoglycan which consists of polysaccharide and peptide. Peptide crosslinks help hold the polysaccharide chains together. The bacterial enzyme D-alanyltranspeptidase is known to affect these crosslinks ans it binds to the D-Ala-D-Ala end of peptisdes. The beta-lactam region of the antibiotics are similar to the D-Ala-D-Ala ends of peptisdes. They can hence inhibit D-analytranspeptidase by creating a enzyme intermediate which slowly hydrolyses the covalent acyl bond.
Explain how bacteria could be useful instead of hazardous?
explain how bacteria could be useful instead of hazardous.
Explain why some plasmids contain a gene for resistance to an antibiotic?
Plasmids provide a mechanism for horizontal gene transfer within a population of microbes and typically provide a selective advantage under a given environmental state. Plasmids may carry genes that provide resistance to naturally occurring antibiotics in a competitive environmental niche, or the proteins produced may act as toxins under similar circumstances.
What does selection mean in game maker?
Explain. I have never seen the term selection used.
