1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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

You might be interested in
Due to hunting, the population of Northern elephant seals was reduced to 20 individuals at the end of the 19th century. Since th
anygoal [31]

Answer:

Option C

Explanation:

Long term hunting has led to following  

a) Reduction in population size and hence the gene pool

b) Causation of Bottleneck effect

Due to above factors, the remaining population of Northern elephant seals does not represent the original genetic problem.  

Due to this restriction in mating and genetic variation shall prevail pertaining to reduced gene pool.  

Due to continuous hunting, the gene pool will further shrink, leading to genetic similarity among the organism

Option C is correct

8 0
3 years ago
Predict how doubling the length of the sides of a cube-shaped cell would affect
Minchanka [31]

Answer:

Increasing the size of the cube-shaped cell increases the volume. However, the surface area-to-volume ratio decreases. This means that the simple diffusion would take more time distribute nutrients across the cell (and even in the eliminate waste). It would need bulk transport such as vesicle transport, otherwise cell activities would slow down.

4 0
3 years ago
What is the single most important factor that defines desert biomes? Why are deserts divided into different types?
irinina [24]
Important factor defining the desert biomes is its tendency to lose water by evaporation, and this potential for water loss exceeds the annual rainfall and defines what organism can live in there.
7 0
3 years ago
Read 2 more answers
Why does an object has more Kinetic Energy than other
Nata [24]
Objects have more kinetic energy than others because when an object is just  sitting their they are not using any energy but then they save energy. 
8 0
3 years ago
Why do cell biologists study yeast?
andrezito [222]

Biologists study cells due to the cell relation to that of animal cell

<h3>What are yeasts?</h3>

Yeast are eukaryotic organisms which are part of the fungus kingdom.

They are important to biologist because they tend too carry out all the functions of the eukaryotic cells and they are known to be closely related to animals

Learn more on yeasts here: brainly.com/question/25088514

#SPJ11

8 0
2 years ago
Other questions:
  • What elements make up molecules of sugar?
    13·2 answers
  • Chromatic aberration ___. Fill in the blank
    6·1 answer
  • If the diploid organism has 24 chromosomes how many chromosomes would each haploid cell have
    12·1 answer
  • Where is the fluid that the lymphatic system collects returned to the blood?
    9·1 answer
  • The quality of services depends on who provides them as well as when, where, and how they are provided. Which characteristic of
    7·1 answer
  • The bulk of the atp for aerobic exercise comes from the oxygen-requiring process of _____.
    5·1 answer
  • Which of the following describes a mutual relationship?
    10·2 answers
  • Wrong answers only!!! What is the main source of surface water turning into underground water?
    11·2 answers
  • Based on the information in the table above, what Domain name should replace the X?
    15·1 answer
  • Biology i will give brainliest
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!