Antibiotics, such as penicillin, are drugs that kill or prevent the growth of bacteria. when antibiotics were first discovered, they seemed to represent a miracle cure for human diseases like pneumonia, typhoid, bubonic plague, and gonorrhea. today there are resistant strains of bacteria that cannot be killed by antibiotics. can you pick out the statements that accurately describe the development of antibiotic resistance? antibiotic resistance is not an example of natural selection. mutations may be a source of variation in any population of bacteria. when antibiotics are used at first, all the disease-causing bacteria are killed. there is always variation in a population and might include resistant bacteria. bacteria that are not initially killed by the antibiotic, reproduce passing the resistance on to offspring.

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

He did not infringe upon the policy making powers that he felt the constitution gave congress. but the determination of foreign policy became preponderantly a presidential concern. when the french revolution led to a major war between france and england, washington refused to accept entirely the recommendations of either his secretary of state thomas jefferson, who was pro-french, or his secretary of the treasury alexander hamilton, who was pro-british. rather, he insisted upon a neutral course until the united states could grow stronger. which provides the best objective summary of this excerpt? president washington made a good choice when he decided not to accept the recommendations of his advisors and instead insisted that the united states stay neutral during the war between france and england as president, washington believed that the united states should remain neutral in foreign policy even though he had advisors who recommended that he take sides during the war between france and england. washington did not make policy decisions during his presidency because he did not want to interfere with the policy-making powers that the constitution gave congress. washington refused to accept entirely the recommendations of either his secretary of state thomas jefferson, who was pro-french, or his secretary of the treasury alexander hamilton, who was pro-britis