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
NemiM [27]
3 years ago
12

Alexandra fleming was working with a bacteria called staphylococcus which looked like bunches of grapes under the microscope. He

could grow colonies of these bacteria on petri dishes with a growth medium. If mold contains a substance that kills bacteria then...?
Biology
1 answer:
denis-greek [22]3 years ago
6 0

Answer:

In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present.

Fleming thought that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died. He also added the same type of broth that had not been exposed to the mold, to a culture of the same type of bacteria. Nothing happened to the bacteria.

Explanation:

n 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present.

Fleming thought that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died. He also added the same type of broth that had not been exposed to the mold, to a culture of the same type of bacteria. Nothing happened to the bacteria.

You might be interested in
Shape is a chemical property.<br> True<br> False
stepladder [879]

Answer:True

Explanation:

6 0
3 years ago
Read 2 more answers
What happens to the hydrosphere as more glaciers are formed.
SOVA2 [1]

There is less liquid water on Earth.

6 0
3 years ago
The best form of environmental stimulation during the first 3 years of life is:
ioda

Answer: The first three years are the most critical in shaping the child's brain architecture.

Explanation: They have a direct impact on how children develop learning skills as well as social and emotional abilities.

3 0
2 years ago
Which two cell parts are mostly likely found in both types of cell
xxTIMURxx [149]

Nucleolus

Ribosome

Cell membrane

Just a few.

-Steel jelly

4 0
3 years ago
Read 2 more answers
What is the difference between fragmentation and regeneration
tester [92]
<span>What is the difference between fragmentation and regeneration ?

</span><span>-Fragmentation</span> is when an organism is split into fragments, and each fragment grows into complete, individual organisms that are clones of the original organism.

-Regeneration is the process of regrowth that organisms that allows for partial or complete regrowth of tissue after a damaging event.

The difference is that fragmentation specifies two parts each growing into complete organisms, but regeneration is simply a general process of regrowth. Few species are capable of fragmentation, but ALL species undergo regeneration, to varying degrees


3 0
3 years ago
Other questions:
  • What are the similarities between the onion and white fish cells?
    10·2 answers
  • Leaves are important plant structures because they
    9·1 answer
  • "There is evidence that eukaryotic cells evolved from a prokaryotic ancestor most closely related to the Archaea. What would you
    10·2 answers
  • What is effect and couse of <br>effect people don't visit the dentist<br>​
    9·1 answer
  • Which of these plant parts would most likely have the largest number of chloroplasts?
    12·1 answer
  • What is the receptors?
    9·1 answer
  • Greg Developed and Ear infection. His doctor gave him an antibiotic. The antibiotic killed all the bacteria in his body. What ot
    9·1 answer
  • Which of the following statements best describes cellular respiration?
    13·2 answers
  • 4. Which of the following statements about magnetic materials TRUE?
    15·2 answers
  • Influenza, strep throat, measles, and the common cold are all infectious diseases. Which of the following methods can be used to
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!