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Bogdan [553]
3 years ago
7

An antibiotic was effective 20 years ago against a specific type of a specific type of bacterial infection no longer works again

st the same kind of infection today. Which best explains why the antibiotic is no longer as effective as it was 20 years ago?
a. Bacteria resistant to the antibiotic have killed off nonresistant bacteria
b. have changed the structure of the bacteria that causes the infection
c. Resistant bacteria have survived and reproduced at a greater rate than nonresistant bacteria
d. The human body has developed an immunity to the antibiotics
Biology
1 answer:
Sliva [168]3 years ago
4 0

c. Resistant bacteria have survived and reproduced at a greater rate than nonresistant bacteria

Explanation:

The antibiotic is no longer effective as it was 20 years ago because the resistant bacterial have survived and reproduced at a greater rate than the non-resistant bacteria.

  • The antibiotics have specifically designed to exterminate the disease causing bacteria strain from the body.
  • While at that point in time, it is potent and does the work. Along the line, it will cause the structures of some other strains to change.
  • This will lead to the development of resistant breeds with time.
  • The resistant breed will then be able to survive the onslaught of the antibiotics making it not a good fit.

Learn more:

Selective force brainly.com/question/4602376

#learnwithBrainly

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Well, wind and solar energy are good places to look at. The highest wind speed recorded in Antartica was roughly 199 mph, so they would definitely gain a large amount of energy from the wind. A smaller turbine can handle severe weather conditions, so setting some up along the most wind ridden places would be good. Solar energy would also be the best option since their days are longer than their nights over there. There can be days at a time where the sun doesn't rise at all, and then there are some where there is sunlight for a full 24 hours. So, it really depends on your preference, and the cons and pros of the energy type.
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