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What else can I help you with?
The use of an antibiotic resistance gene on a plasmid used in genetic engineering makes?
direct selection possible
Which type of selection tends to increase genetic variation?
Natural Selection.
Enumerate the types of selection constructs in c plus plus?
Selection constructs in C++if...elseswitch/caseconditional ternary operator (?:)
What is selection structure in programming?
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When is quick sort better than selection sort?
Because the quick sort can be used for large lists but selection not. selection sort is used to find the minimum element ,but quick choose element called pivot and move all smaller nums before it & larger after it.
How does pesticide resistance develop over time?
The pesticide resistance develops over time due to the natural selection.
What is an example of direct evidence for evolution is... genetic changes in plants antibiotic resistance in bacteria pesticide resistance in insects or all of the above?
All of the above examples are direct evidence for evolution. Genetic changes in plants, antibiotic resistance in bacteria, and pesticide resistance in insects all demonstrate how species can adapt and evolve to survive in changing environments. This supports the theory of evolution by natural selection.
Pesticide resistance in mosquitoes is an example of?
accelerated rates of natural selection due to human involvement.. natural selection caused by human intervention.
How pesticides resistance evolve?
Pesticide resistance evolves through natural selection. When a pesticide is applied, some individuals within the target pest population may have genetic variations that make them less susceptible to the pesticide's effects. These individuals survive, reproduce, and pass on their resistant traits to their offspring, leading to an increase in resistance over time. Continuous use of the same pesticide can further select for resistance, making it more difficult to control the pest population.
How did pesticide-resistant insects came about as a result of evolution?
Natural selection, the method by which evolution works, is driven by the fact that organisms that die before reproducing do not pass on their genes to their offspring and because of this only those that can survive long enough to reproduce will do so and thus populations tend to be filled with those who survive the best in their current environment. The few bugs that don't die from pesticide reproduce and have (mostly) pesticide-resistant offspring that, in turn, have even more pesticide-resistant offspring.
What contributes to the spread of antibiotic resistance among pathogenic bacteria?
Directional Selection
What evidence that supports that natural selection is the primary driving force leading to change over time in an organism?
Direct observation: Darwin's Finches, Nylonase Bacteria, virus/bacteria drug resistance, mosquito pesticide resistance, etc. It is always observed that those best at surviving are those that reproduce.
The use of an antibiotic resistance gene on a plasmid used in genetic engineering makes?
direct selection possible
How does the use of antibiotics and pesticides cause resistance in insects and bacteria?
The use of antibiotics and pesticides creates an artificial selection scenario that culls bacteria and insects that cannot survive the treatments. Those micro-organisms and insects that do not succumb to the effects of antibiotics and pesticides survive to reproduce, and their offspring share their resistance to the antibiotics and pesticides that did not kill them. Now the entire population is resistant. Here is an example of how to make a population of insects pesticide resistant (micro-organisms respond similarly to antibiotics): Assumption: Insect Population I has a 99% mortality when exposed to Pesticide P Stage 1: 100,000 Population I insects are treated with Pesticide P Stage 2: Pesticide P treatment kills 99% of Population P Stage 3: 1,000 insects survive and reproduce Stage 4: Population R is 100% resistant to Pesticide P
Are Antibiotic resistance evolved through the process of natural selection acting upon random mutation?
Yes, antibiotic resistance typically arises through a combination of random mutations in bacteria's genetic material and natural selection favoring those bacteria that have mutations conferring resistance to antibiotics. Over time, these resistant bacteria survive and multiply, leading to the emergence of antibiotic-resistant strains.
How is pesticide resistance an example of evolution?
Disinfectants are a type of antibiotic. Brand X kills 99.9% of all bacteria when used as directed. .1% of the bacteria survive. Let us say that the treated area is 1 square foot and the original population one type of bacteria was 1 million. This means that 10,000 of these bacteria survived due to any various differences between them and the dead. The 10,000 divide every 24 hours so, in a very short time, the 1 square foot area is repopulated with bacteria that has the genetic potential to survive the next round of disinfectants. Not all of these offspring will. Over time our handy dandy disinfectant only kills 80% and the amount of bacteria is still enough to cause illness. Extrapolate this scenario to the interior of the human body and the use of medications. Add the fact that many people DO NOT use them as directed any more than most people use a surface disinfectant as directed and we have a neat little breeding ground where natural selection occurs at an alarming rate.
How can resistance to DDT evolve in mosquitoes?
It works in this case just as it does in resistance to antibiotics. When the environment is changed, those living in it will be either affected or not. Some bacteria or mosquitoes will not be affected and some will. The affected ones will die and the others will not. Those that don't die will have genes that allow this to happen for them. They will pass those genes on to their offspring. Those offspring will also be resistance to what every pesticide or antibiotic being used to kill them. You are seeing actual natural selection and evolution at work. Penicillin was used in WW2 in 1943. Today, there are bacteria that are resistant to every antibiotic that we have. Some are resistant to 23. Unless the insecticide kills every mosquito, the ones that survive will grow in numbers and we will have to find something else. The most we usually can hope for is just to be able to control the numbers.
