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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
What else can I help you with?
What is an example of micro-evolution?
An example of micro-evolution is the development of antibiotic resistance in bacteria due to natural selection. When exposed to antibiotics, bacteria with genetic mutations that provide resistance to the drug survive and reproduce, passing on the resistant trait to future generations. Over time, the proportion of resistant bacteria in the population increases, leading to the evolution of antibiotic-resistant strains.
Is bacteria used as a pesticide?
Yes, certain types of bacteria are used as pesticides to control insect pests. One common example is Bacillus thuringiensis (Bt), which produces proteins toxic to insects when ingested. Bt is considered an environmentally friendly alternative to chemical pesticides.
How would spraying a yard with chemical pesticides to control insects be most likely to affect the diversity of insects found in it?
Spraying a yard with chemical pesticides can harm non-target insect species, disrupt the balance of the ecosystem, and lead to a decrease in insect diversity. It can also create resistance in insect populations and eliminate beneficial insects along with pests, ultimately reducing the overall diversity of insects found in the yard.
What pesticides are used to kill insect pests?
Common pesticides used to kill insect pests include organophosphates, carbamates, pyrethroids, and neonicotinoids. These pesticides work by disrupting the nervous system of insects, leading to paralysis and eventual death. Organic options like neem oil and insecticidal soaps are also used as alternatives to synthetic pesticides.
What are Bio pesticides?
Biopesticides are natural substances derived from living organisms, such as plants, bacteria, fungi, or insects, used to control pests or diseases in agriculture. They are considered environmentally friendly alternatives to synthetic pesticides, as they have minimal impact on non-target organisms and are often biodegradable. Examples include neem oil, Bacillus thuringiensis (Bt), and parasitic wasps.
What are two examples of biological resistance?
Antibiotic resistance: Bacteria can develop resistance to antibiotics through genetic mutations, making the drugs less effective in treating infections. Pesticide resistance: Insects can develop resistance to pesticides over time, reducing the effectiveness of pest management strategies in agriculture.
What is an example of micro-evolution?
An example of micro-evolution is the development of antibiotic resistance in bacteria due to natural selection. When exposed to antibiotics, bacteria with genetic mutations that provide resistance to the drug survive and reproduce, passing on the resistant trait to future generations. Over time, the proportion of resistant bacteria in the population increases, leading to the evolution of antibiotic-resistant strains.
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.
What are some ways that mutations in some living things are helpful to those organisms but harmful to humans?
Mutations in bacteria that confer antibiotic resistance help the bacteria survive and thrive in their environment, but can be harmful to humans if these bacteria cause infections that are difficult to treat. Similarly, mutations in insects that confer resistance to pesticides help them survive, but can be harmful to humans as it makes pest control more difficult.
Why are pesticides useful to farmers?
Reduces the percentage lost to insects or other pests such as weeds, rodents, bacteria, fungi, and birds.
Is bacteria used as a pesticide?
Yes, certain types of bacteria are used as pesticides to control insect pests. One common example is Bacillus thuringiensis (Bt), which produces proteins toxic to insects when ingested. Bt is considered an environmentally friendly alternative to chemical pesticides.
How does resistance to antibiotics in humans and pesticides in insects exemplify the process of evolution by natural selection?
So, you use antibiotic on bacteria and insecticides on insects while knowing all organisms are variants and some will survive your attacks and reproduce the next generations that will also have the survivability traits. Not quite natural selection, as it is not the environment doing the selecting, but quite effective in causing evolution by selecting the alleles that will survive and reproduce. Evolution is the change in allele frequency over time in a population of organisms.
Why are pesticides used?
Pesticides are used in order to kill insects. If insects get on some types of vegetation, it can kill it.
Does all poison affect humans?
No. Organophosphate pesticides kill insects not humans because humans can break them down. But other organophosphate poisons called nerve gases kill both insects and humans. This same effect is true for many other poisons, some organisms can break them down while others can't. Bacteria and some plants are killed by antibiotics that damage cell walls. But animals and fungi are unaffected by antibiotics as their cells lack cell walls.
Example of movement of pesticides in a lake from aquatic insects to the bald eagle?
The movement of pesticides in a lake from aquatic insects to the bald eagle occurs in several steps. For example, first the insects are contaminated by pesticides in the lake. If a trout consumes these insects, the trout's flesh now has pesticides in it. When the bald eagle swoops down to catch and eat the trout, it ends up eating the pesticides as well.
How do pesticides affect blue banded bees?
Pesticides are detrimental to any type of insects as they are, quite frankly, poison. Pesticides kill some insects, or interfere with the reproductive cycle, or prevent them from feeding safely.
How would spraying a yard with chemical pesticides to control insects be most likely to affect the diversity of insects found in it?
Spraying a yard with chemical pesticides can harm non-target insect species, disrupt the balance of the ecosystem, and lead to a decrease in insect diversity. It can also create resistance in insect populations and eliminate beneficial insects along with pests, ultimately reducing the overall diversity of insects found in the yard.
