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
zheka24 [161]
3 years ago
13

The virulent form of the bacteria S. pneumoniae is called the S strain because it is surrounded by a polysaccharide coat that ma

kes it appear smooth under a microscope. Sometimes the S strain mutates into a non-virulent form (called the R strain), which lacks the polysaccharide coat and appears rough. Frederick Griffith performed an experiment in which he injected mice with different combinations of these bacterial strains. Drag the labels to indicate whether the mice live or die after each injection and the explanation for each test result.
Biology
1 answer:
Aleksandr-060686 [28]3 years ago
6 0

Answer:

1. living s strain= mice dies

2. heat killed s strain= mice live

3. living r strain= mice live

4. heat killed s strain + living r strain= mice die

Explanation:

Options

1. living s strain

2. heat killed s strain

3. living r strain

4. heat killed s strain + living r strain

Solution

It is known that S strain of the pneumococcal bacteria has virulent properties and hence it can kill an organism but when this S strain is heated its virulent factor dies and it becomes ineffective. R strain on the other hand does not possess virulent characteristics and hence it does not affect the mice. If R virulent is mixed with heat killed S strain, the new  strain is  transformed virulent strain which could kill an organism.

Considering above description, the answer would be  

1. living s strain= mice dies

2. heat killed s strain= mice live

3. living r strain= mice live

4. heat killed s strain + living r strain= mice die

You might be interested in
A nurse is performing cardiac compression on an adult client. how far must the nurse depress the lower sternum to maintain circu
dmitriy555 [2]
<span>3.2 inches. The nurse if doing a cardiopulmonary resuscitation. It is an emergency procedure combines with chest compression and artificial ventilation. It is done during a cardiac arrest. When doing so the nurse should compress the lower sternum by 3.2 inches.</span>
4 0
3 years ago
Where does glycolysis occur in animals? glycolysis in animal cells
larisa86 [58]
Glycolysis is the first stage of cellular respiration that occurs in the cytoplasm of animal cells. It is the only stage that occurs outside of the mitochondrion.
3 0
3 years ago
The study of large body structures, visible to the naked eye, such as the heart is called ________ anatomy.
never [62]
The answer to this question is the term Gross Anatomy. The Gross Anatomy is also known as topographical anatomy which is the study of large body structures at the macroscopic levels. Gross anatomy deals with body structures that with minimal magnification because it is seen by the naked eye.
7 0
4 years ago
Why is it difficult to avoid a tsunami?
Gelneren [198K]

Answer:

It is difficult to avoid a tsunami due to it being such a large volume of water that is capable of destroying a large amount of land.

Explanation:

However, even though it is difficult to avoid a tsunami, as they are extremely difficult to predict, there are ways where one can begin to prepare before it hits. One of the ways you can do this is getting to a higher ground far away from inland, avoiding downed power lines, and steering clear of buildings or bridges where large, heavy objects could fall during an aftershock.

Tsunamis are incredibly dangerous, since there is a great chance that if you get caught in one, you can drown. Since tsunamis have little to no warning when they arrive, it is always essential to be prepared when one strikes.

I hope this helped! :)

7 0
3 years ago
Before a cell divides, the DNA is checked to make sure it replicated correctly. This
Reika [66]

Answer:

the cell will die

Explanation:

its chromosomes, an enzyme called cyclin dependent kinase, or CDK, will not activate the cyclin, and the cell cycle will not proceed to the next phase. <u><em>The cell will undergo cell death</em></u>

8 0
3 years ago
Other questions:
  • Which statement accurately describes how magnetic stripes in ocean rock provide evidence of seafloor spreading?
    8·2 answers
  • Which of the following does not lay amniotic eggs?
    8·1 answer
  • A classic method of measuring the retention of material in long-term memory over time is to ____.
    6·1 answer
  • two body parts that are physically similar but have different functions in different species are called?
    10·1 answer
  • This image shows
    11·1 answer
  • How does a hypothesis help scientist undertsand the natural world?
    8·1 answer
  • Special organs that store leukocytes are the _____. thymus and spleen thymus and hypothalamus spleen and liver pancreas and pitu
    9·1 answer
  • In Gottlieb's model, the probabilistic aspect of development refers to the idea that the characteristics of organisms at any poi
    11·1 answer
  • HURRY ILL MARK AS BRAINLIEST!
    11·1 answer
  • PLEASE HELP ME!!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!