Bacteria can evolve resistance to antibiotics quickly because of which processes? Select all that apply. O Conjugation Natural selection Genetic drift Mutation
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- Antibiotics such as tetracycline, streptomycin, and bacitracin aresmall organic molecules that are synthesized by particular speciesof bacteria. Microbiologists have hypothesized that the reason whycertain bacteria make antibiotics is to kill other species that occupythe same environment. Bacteria that produce an antibiotic may beable to kill competing species. This provides more resources forthe antibiotic-producing bacteria. In addition, bacteria that havethe genes necessary for antibiotic biosynthesis contain genes thatconfer resistance to the same antibiotic. For example, tetracyclineis made by the soil bacterium Streptomyces aureofaciens. Besidesthe genes that are needed to make tetracycline, S. aureofaciensalso has genes that confer tetracycline resistance; otherwise, itwould kill itself when it makes tetracycline. In recent years, however,many other species of bacteria that do not synthesize tetracyclinehave acquired the genes that confer tetracycline resistance.For example,…Antibiotics such as tetracycline, streptomycin, and bacitracin aresmall organic molecules that are synthesized by particular speciesof bacteria. Microbiologists have hypothesized that the reason whycertain bacteria make antibiotics is to kill other species that occupythe same environment. Bacteria that produce an antibiotic may beable to kill competing species. This provides more resources forthe antibiotic-producing bacteria. In addition, bacteria that havethe genes necessary for antibiotic biosynthesis contain genes thatconfer resistance to the same antibiotic. For example, tetracyclineis made by the soil bacterium Streptomyces aureofaciens. Besidesthe genes that are needed to make tetracycline, S. aureofaciensalso has genes that confer tetracycline resistance; otherwise, itwould kill itself when it makes tetracycline. In recent years, however,many other species of bacteria that do not synthesize tetracyclinehave acquired the genes that confer tetracycline resistance.For example,…I dont understand this practice Biology Question. In order to categorize bacteria, scientists use various characteristics to classify them into groups. Without naming these groups, explain characteristics and tests used by microbiologists to assign bacteria to different taxonomic groups.
- You are helping a patient who you think has CJD. They want you to explain how this happened. Which explanation below is NOT correct? O spontaneous misfolding of the normal prion with age O possible transfer of abnormal prions on contaminated surgical instruments O overuse of antibiotics O possible transfer of abnormal prions from blood transfusion O possible transfer of prions through organ transplant O consumption of beef from cattle with BSE Question 65 Below are stens in the evolution/emergenco of vCDSeni 1 pts Which of the following is a type of gene transfer that is NOT species-specific? O conjugation O transformation O transduction nts O binary fission Question 6 1 pts Bacteria most commonly aqquire resistance to conventional antibiotics by O a. being exposed to antibiotics which induce mutations O b. spontaneous mutations O c. receiving resistance genes from other bacteria O a and b O band c O a, b, and c Question 7 1 ptsIn 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi.Symptoms of the disease include weakness and loss of appetite, victims often died of heart failure.Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria fromthe blood of patients with beriberi. The injected chickens became sick. However, so did a group ofchickens that were not injected with bacteria.One of the scientists, Dr. Eijkman, designed a new experiment based on his ownobservations. Before the experiment, all the chickens had eaten whole-grain rice, butduring the experiment, the chickens were fed polished rice. Dr. Eijkman researchedthis interesting case and found that polished rice lacked thiamine, a vitamin necessaryfor good health.1. State the question or problem that Dr. Eijkman investigated. 2. What was the original hypothesis? 3. What was the manipulated (independent) variable and the responding (dependent) variable? 4. Write a…
- Which of the following options best describes the process of selection for antibiotic-resistant bacteria in the presence of an antibiotic? Antibiotic resistance occurs when the human body resists an antibiotic; the bacteria are not under selective pressure Antibiotic-resistant cells are naturally stronger, so they always take over in the presence of antibiotic- sensitive cells Antibiotics kill off sensitive cells, while resistant bacteria survive and multiply O In the presence of antibiotics, most bacterial cells react by becoming resistant before they start dividing again MacBook Air DD 000 80 F9 000 F8 F7 F5 F6 F3 F4When looking at the transformation lead to evolution in bacteria?remember evolution involves selection of the fitttest ,think about how bacteria can be fit and what they can get their bacteria friends to be even more in shape?3 TED Ed What causes antibiotic resistance? - Kevin Wu BACTERIA Watch on YouTube E More and more bacteria are becoming antibiotic-resistant. How might this affect our ability to fight certain infectious diseases in the future? $ * bacteria will mutate back to their susceptible states over time. our immune systems will evolve to better fight the bacteria so we won't need R % A VS. 5 ANTIBIOTICS T 6 G & Y 7 TEDED Share H U 8 9 insert K ☆ P
- Fun QuestionWhen a bacteriophage accidentally incorporates a fragment of host DNA in its capsid and delivers it to another (living) bacterial cell, the process is called _____. transformation transduction conjugation speciationvariation selection adaptation 4. The diagram above shows the process of natural selection. What is X? sc.7.L.15.2 Acompetition Bievolutionol aneggerl 16vr Omimicry of 1qebe oi aldsm D Oreproduction
