Many kinds of disease-causing bacteria are resistant to the standard antibiotics that we use to control them.?
This is because: a. when bacteria are exposed to antibiotics, they mutate. b. there is genetic variety within the species and those that already have genes for resistance are the ones that reproduce. c. new species of bacteria have evolved that are resistant to antibiotics. d. when the size of the population of a species of bacterium is reduced, genetic variety decreases.
What is the mutation of Disease-Resistant potatoes?
When you hear of farmers genetically altering a food, all they are doing is selecting the plants that have the characteristic they want and keep doing it over several generations of the plant. If you have a variety of potatoes and some get diseased and others don't, they select the potatoes that did not get diseased and use them to plant more. Then select the ones again and so on and so on. Eventually you have disease resistant potatoes. Something to thank about though. Selecting potatoes based on their resistance to disease may not be the best tasting potato. Think Red Delicious apples. They have been selected to have a deep red color and a specific shape, but they are the worst tasting and mealy apple in existence.
What are antibiotics not affecting viral disease?
Antibiotics are usually given to fight against bacteria not virus. Antibiotics remain inactive when it comes to viral diseases like chicken pox, AIDS etc.In cases of viral diseases, anti viral tablets are available, but they are less effective comparitively.
How does the misuse of antibiotics affect the evolution of disease-causing bacteria?
The antibiotics will kill some bacteria but not all and the ones that are resistant to the antibiotic will survive and reproduce passing on their resistance. One of the major influences in the development of so called 'super bugs' is the use of low level antibiotics as livestock growth promoters. This practice has been banned in Europe and Scandinavia but is still permitted in American farming due to the influence of the farming lobby. A microbiology professor I spoke to described this as a dangerously trivial use of antibiotics that could seriously threaten the effectiveness of modern medicine.
What are resistant bacteria and how do they affect us?
Resistant bacteria I think is bacteria that is immune to anti-bacterial soaps and cleaners. It is bad, because regular handsoap right now isn't killing all the germs and bacteria that is bad for us. The only thing we can really rely on is Purell® and other hand sanitizers. They kill a lot of germs. What this is is mutation of the germ to fight against what kills it, a form of evolution. Pay attention in biology and you won't be confused.
Why are antibiotics not effective for viral diseases?
Why are some antibiotics not effective against some viral diseases.Antibiotics work against metabolically active organisms and viruses are essentially dead until they hijack a cell's processes.So, antibiotics aren't effective against only some viruses, they are effective against none of them. Anti-virals are the medications that work against viruses, and they actually work on the cells of the body and not on the viruses themselves.
Would an organism with greater resistance to disease tend to produce more offspring?
Yes I would say so. With a greater disease resistance, it wouldn't be as much affected by the items humans use that can shorten a life-span. It also would have a way smaller chance of catching cancer, Alzheimer's, STD's, etc. that could be deadly. It may also be able to stay more fertile and less able to catch sexual disabilities (erectile dysfunction). These resistances would allow it to live longer and produce much more offspring.
Is there a human that is resistant to HIV?
There are a small number of people who have developed natural immunity to HIV. They are being intensely studied. If we are able to determine how their immune system was able to develop antibodies to HIV it may lead to the development of a vaccine.