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
Advocard [28]
3 years ago
7

When the first antibiotics became available in the late 1940s and early 1950s, these antibiotics were effective against all bact

erial infections. Today however, there are a multitude of antibiotic resistant bacterial infections. What conclusion can be drawn? A) Antibiotics of today are not as strong as those in the past. B) Antibiotics cause DNA mutations in bacteria, and over time, this has led to resistance. C) Over time, bacteria have turned into viruses, and antibiotics have no affect over viruses. D) Bacteria have become resistant to antibiotics over time due to evolution by means of natural selection.
Biology
2 answers:
kirza4 [7]3 years ago
8 0
The correct answer would be D.

After many generations, only those with genes suitable to live in harsh environments can live. These genes are passed onto their offspring and then we see a rise in antibiotic resistant strains of bacteria such as Methicillin Resistant Staphylococcus Aureus (MRSA).
Dmitry [639]3 years ago
6 0
Answer is D. how do i no? i got it right on USA test prep. 
You might be interested in
which one of the following statements is true regarding voluntary and involuntary responses? a. involuntary responses may includ
Alexeev081 [22]
<span>involuntary responses are part of the autonomic system 

</span>
5 0
2 years ago
Power and work measure the same phenomenon only in different ways
AnnZ [28]
If your asking if its true or false, it would be False.

Hope this helps!
5 0
3 years ago
Which layer of the sun is only seen during a total solar eclispe?
Anton [14]

the <em>sun's corona</em> is only visable when there is a solar eclipse

3 0
2 years ago
Read 2 more answers
A benign tumor differs from a malignant tumor in that a benign tumor
ale4655 [162]

Your answer is...

<em>A benign tumor is a noncancerous group of cells that does not spread any harmful substances to the impacted area nor anything at all. It is safe compared to Malignant tumors and typically cause no harm to the body.</em>

<em />

Benign tumor:

Although it is noncancerous, if it is applying pressure to any vitals such as the blood vessels or nerves, it causes an obstruction. Thus ending up having to require treatment occasionally but not in all cases. It is considered a "good" tumor since it does not cause any pain or any problems when it doesn't apply pressure.

Malignant Tumor:

A Malignant Tumor is known as cancerous, or just cancer. These can be spread around the affected area of tissue or throughout the body. It is uncontrollably spread and disease ridden tumor that destroy the body tissue of the person. If this moves into the bloodstream, it can lead up to spreading within the lymph nodes, causing even more damage.

7 0
3 years ago
The side toes of a horse, the pelvis of the whale, and the human appendix are all examples of structures that resemble structure
Advocard [28]
These structures are called Vestigial structures, they resemble structures from the organism's ancestors, but don't have a real purpose for them now. 

Pray this helps you :)
6 0
3 years ago
Read 2 more answers
Other questions:
  • Bases have ____________ H+ concentrations and ____________ OH- concentrations.
    5·1 answer
  • You are walking to school when you encounter a strange barking dog. you tense up and contemplate whether you should run away. wh
    10·2 answers
  • What special care one must take of his health during adolescence
    14·1 answer
  • Which macromolecules are often made of three fatty acid‘s bond to a glycerol molecule.
    5·2 answers
  • the pedigree chart to the right shows the passing on of colorblindness. what sex can only be carriers of colorblindness
    5·1 answer
  • Imagine that your best friend at school was diagnosed with galactosemia. How could you help them through out the day? (FOUR THIN
    5·1 answer
  • Which neurotransmitter is a major regulator of mood and behavior and can be chemically altered using drugs like Prozac or Zoloft
    9·2 answers
  • A population of ground mice consist of 500 individuals. You are interested in the gene that codes for for a color and find out t
    15·1 answer
  • The father of two children is type 0+, and the mother is type A+. The children are O- and A+.
    13·1 answer
  • Select the options below that plays a role in the transport of small molecules into the cell
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!