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
denpristay [2]
3 years ago
7

The bacteriologist Sir Alexander Fleming was engage in the study of staphyococcus a kind of bacteria that wa being grown in petr

i dishes . That's when he noticed the peniciin mold that was aso growing in some culture dishes. There was a clear area around the penicilin . Sir Alexander hypothesised that the penicillin mold could be producing a chemical that kills bacteria.o He decided to test his hypothesis by isolating the chemical and testing it to see if it would really kill bacteria . He transferred it to a solution of nutrient broth that contained the elements necessary to it's growth . Once the mold flourished , he removed it from the broth and transferred the broth to a culture of bacteria. the bacteria died as a result. This discovery was used to develop several kinds of antibiotics that treated several deadly diseases. what is the problem here ? what is the hypothesis?
Biology
1 answer:
11Alexandr11 [23.1K]3 years ago
4 0
The problem is that mold was growing in some of the dishes. The hypothesis is that the mold can cure bacteria.
You might be interested in
Laypeople often misunderstand anatomical terminology. What do you think people really mean when they say they have "planter's wa
nordsb [41]

Answer:

I don't know

Explanation:

wait is this like for an assignment or sum?

4 0
2 years ago
Read 2 more answers
Match the object with its characteristic
Nuetrik [128]

Moon: Not magnetic

Compass: Permanent Magnet

MRI: Not Magnetic

7 0
3 years ago
Read 2 more answers
Urinary tract infections are commonly caused by Staphylococcus saprophyticus and Escherichia coli, less commonly caused by Prote
Delicious77 [7]

Answer:

B. MacConkey is both a differential and a selective medium.

Explanation:

Selective media contain the ingredients that allows for the growing of specific microbes while inhibiting the others.

For example MacConkey media facilitate the growth of gram negative bacteria and inhibit the growth of gram positive bacteria. That why E. coli and P. mirabilis grew on the media because these are gram negative and S. saprophyticus does not grew being gram positive.

Differential media allow to differentiate between selected microbes by visual observation.

For Example MacConkey media differentiate between organisms that can ferment lactose to the organisms that can't ferment it. That why E. coli appeared pink on the media because it can ferment lactose while P. mirabilis appears colorless because it usually cannot ferment lactose.

5 0
3 years ago
Which statement describes a similarity between the skeletal and muscular systems?
nasty-shy [4]

Answer:

D.Both systems control movement

Explanation:

Skeletal protect the organs and hold up the body to move and the muscular system is for controlling movement.

Feedback:I hope this helped you!!
6 0
3 years ago
People with chronic high blood pressure or hypertension often take a specific type of drug, called a diuretic, to help control t
Anastaziya [24]

Answer:

D)

Explanation:

Hoping it helps sorry if its wrong

8 0
2 years ago
Other questions:
  • How many ATP are generated in the election transport chain
    10·1 answer
  • Why are cells considered a necessary precursor to life?
    11·2 answers
  • Shaquita is sitting on a bench watching two bikers ride by her in opposite directions. Which of the following statements is corr
    9·1 answer
  • In the following table, label each statement as true (T) or false (F). If the statement is false, rewrite it so that it is true.
    14·1 answer
  • The anatomical position is used ________.
    10·1 answer
  • An investigator wants to understand whether a newly found membrane protein is involved in membrane transport of a certain partic
    13·2 answers
  • What does the process of natural selection involve?
    8·2 answers
  • Where does the cotton come from that is used to make clothing?
    10·2 answers
  • What is it called when injured blood vessels contract to reduce or stop the flow of blood?
    9·1 answer
  • How does the loss of leaves help a plant survive winter or long periods without rain?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!