The development of antibiotic resistance in bacteria is an example of___. A. natural selection B. artificial selection C. genetic mutation D. random variation 相关知识点: 试题来源: 解析 A。细菌对抗生素的耐药性发展是自然选择的一个例子。具有耐药性的细菌在抗生素环境中更有可能存活和繁殖,从而使耐...
D. A population of bacteria develops resistance to an antibiotic. 相关知识点: 试题来源: 解析 D。细菌群体对抗生素产生抗性是生物进化的一个例子。选项 A 花比往常开得早是环境影响的生理现象;选项 B 鸟比去年下更多蛋不是进化;选项 C 蜥蜴尾巴变长可能是个体生长,不是进化。
Nevertheless, bacteria continue to evolve new mechanisms to evade this drug-mediated killing with surprising speed on the deployment of each new drug and antibiotic worldwide, a phenomenon called antimicrobial resistance (AMR). Nowadays, AMR represents a critical health threat, for which new medical ...
One example of a selective pressure is antibiotic use against pathogenic microbes, and some bacteria have evolved the ability to resist antibiotics. Another example of a selective pressure is resource availability. An area with little water would be a selective pressure in favor of species that are...
aeruginosa by either transformation or conjugation, followed by selection of insertion-containing strains; third, PCR verification of mini-Tn7 insertions; and last, optional Flp-mediated excision of the antibiotic-resistance selection marker present on the chromosomally integrated mini-Tn7 element. From ...
Antibiotics are widely used as prophylactic agents and therapeutics for the prevention or treatment of bacterial diseases in the aquaculture, and their use has been associated with the emergence of antibiotic resistance in bacterial pathogens, alteration in aquaculture environment and animal gut microbiota...
1. Background Pneumonia is a serious global health problem [1] and the leading cause of death in children [2]; pneumonia can be caused by bacteria, viruses, fungi, and other microorganisms [3]. Antibiotics are currently the most important treatment for bacterial pneumonia and have been used ...
Why bacteria are important? Why do some agricultural practices contribute to antibiotic resistance in some bacteria species, and how can this contribute to antibiotic resistance in bacteria that cause diseases in humans? What are some beneficial uses of microorganisms? ...
Proceedings: Factors affecting transfer of antibiotic resistance between gram-negative bacteria in the human intestine. Aims. This article provides insight into the potential economic viability of nurse practitioner employment in Dutch general practices. Background. Genera... Anderson,J D - 《Journal of...
The first natural example of a fossilised earthquake in serpentinite (type of rock) is providing new knowledge about the extreme forces and chemical reactions that occur during seismic ruptures.