<span>Use of Antibiotic is the main reason for development of antibiotic-resistant bacteria.
</span><span>When a person is given the dose antibiotics, sensitive bacteria are killed, but resistant germs are sometimes left to grow and and increase in number.</span>
Antibiotic resistance is the ability of an organism to stay unaffected by the effects of antibiotics. Natural selection caused by random mutation is the main cause of Antibiotic resistance.
Hence,The right answer is : Option B: "<span>Although less common previously, the resistant strain becomes more prevalent due to natural selection."</span>
Answer: nicotine
Explanation:
Makers of e-cigarettes and other ENDS often claim the ingredients are safe. But the aerosols (mixtures of very small particles) that these products produce can contain addictive nicotine, flavorings, and a variety of other chemicals, some known to be toxic or to cause cancer. The levels of many of these substances appear to be lower than in traditional cigarettes, but the amounts of nicotine and other substances in these products can vary widely because they are not standardized. The long-term health effects of these devices aren't yet known.
B. i asked my mom shes a surgeon
Answer: c. treadmill and bicycle ergometer.
Explanation:
A stress test can be defined as a kind of exercise which is performed to record how the heart works during the physical activity. As the exercise causes the pumping of heart harder and faster. It is a test which gives information about the flow of blood from the heart, blood pressure and breathing are continuously monitored.
A stress test is usually performed by walking on a treadmill or riding on a stationary bike or bicycle ergometer. As continuous walking and riding is likely to increase the functional rate of heart.