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
1. A small snake is found eating a cricket in a
Tju [1.3M]

The level of succession which involves a small snake is found eating a cricket in a grassland is a Secondary succession.

<h3>What is Secondary succession?</h3>

This is the type of succession which involves an area previously occupied by living things is disturbed or disrupted.

The grassland area has been occupied with living things already which makes it a secondary succession.

Read more about Secondary succession here brainly.com/question/520254

3 0
2 years ago
6 effects of weeds on crops​
garri49 [273]

Answer:

<em>1. They effect crop productivity</em>

As weeds start to grow in the area where the crops were destined to grow, the production of the crops gets lowered.

<em>2. They deplete the crops from nutrition</em>

The weeds will compete with the crop plants for resources such as minerals from the soil.

<em>3. They will deplete water resources</em>

The weeds will compete with the crop plants for water.

<em>4. Sun-light will be depleted</em>

The weeds will complete with the crop plants for sun light.

<em>5. The crop quality will be affected</em>

As the crop plants will be in competition with the weeds, hence their quality will be affected.

6.  <em>They can reduce the biodiversity of crop plants.</em>

4 0
2 years ago
Terrance, whose birth mother drank alcohol heavily throughout pregnancy, has a thin upper lip, short eyelid openings, a small he
Alenkasestr [34]

Answer:

fetal alcohol syndrome

Explanation:

  • Fetal alcohol syndrome is a syndrome that is a group of different symptoms or conditions that appear in a person whose mother consumed alcohol during pregnancy.
  • The different problems that a person may suffer from including small head size, short height, thin upper lip, smooth philtrum, etc.
  • Besides this, the mental health of the person is also affected and thus, the person may have memory impairment, social anxiety, etc.
  • Since it has been mentioned that Terrance's mother consumed alcohol throughout pregnancy and the symptoms that Terrance shows also are similar to that of a person suffering from Fetal alcohol syndrome, it can be concluded that he is suffering from this condition.
7 0
3 years ago
Which organelle packages and dristibutes proteins that are received from the endoplasmic
ryzh [129]
Golgi apparatus is your awser to the question
6 0
3 years ago
How do early successional species alter the environment in ways that make growing conditions more difficult for their own specie
Valentin [98]
<span>The early successional species did alter the environment in ways that make growing conditions more difficult for their own species in the way of the rapid growth. Rapid growth is also connected with the short-lived that occurs in the Earth.</span>
4 0
3 years ago
Other questions:
  • Which type of selection leads to increased phenotypic and genetic variation?
    15·2 answers
  • Which of the following is not a key role of cell division?
    8·1 answer
  • 2. You consume a piece of candy that contains 150 glucose
    14·1 answer
  • PLEASE HELP ASAP WILL GIVE BRAINLIEST
    12·1 answer
  • An example of active transport
    12·1 answer
  • Which of the following landmarks is found on the posterior surface of the scapula?
    15·1 answer
  • Which of the following explains what is happening to the fish population due to the increase in human population?
    10·1 answer
  • Outer boundary of the cell in a Plant cell
    13·2 answers
  • MEIOSIS. Questions
    10·2 answers
  • In a hardy-weinberg population with two alleles, a and a, that are in equilibrium, the frequency of the allele a is 0. 3. What i
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!