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
vlada-n [284]
3 years ago
15

The work of Alexander Fleming shows that ____.

Biology
2 answers:
Gennadij [26K]3 years ago
8 0

Answer: C) Not all scientific knowledge begins with an experiment

Explanation:

Fleming's lab was very messy, and one day when he is back from his vacations, he noticed that a colony of a fungus had grown as a contaminant on one of the Petri dishes sown with a bacteria called <em>Staphylococcus aureus</em>. Fleming observed a bacterial lysis, which means the death of the bacteria.

<u>The dishes got contaminated by Penicillium</u>, which is a mold that produces a an antibacterial substance, called penicillin. <u>This is an antibiotic that attacks a wide range of bacteria.</u>

At first, his findings were underestimated and he was not able to isolate this penicillin. But in 1940, Howard Florey and Ernst Chain found out that <u>this antibiotic could be used as a therapeutic agent to fight bacteria.</u>

So, in this case the discovery of penicillin was accidental, without planning a specific experiment.

Roman55 [17]3 years ago
5 0

Answer:

C

Explanation:

My science test told me so.

You might be interested in
The only blood available is type o, would a patient with hiv/aids be able to get a transfusion
KATRIN_1 [288]
Yes because type O blood is the universal donor.
6 0
3 years ago
(02.04 MC)
Genrish500 [490]

Answer:

It is an acute effect of a toxin in the lake

Explanation:

5 0
2 years ago
Read 2 more answers
Nancy designs lenses for cameras and binoculars. Which branch of science
Salsk061 [2.6K]

Physical science deals with lens for cameras and binoculars.

Explanation:

Physical science is a branch of science that deals with the study of intimate natural objects such as it includes physics, astronomy and chemistry related subjects.

A lens is a transparent material that refracts light rays so that image can be formed. A lens has two curved surface which are made up of plastic or glasses which are concave and convex in nature.  A converging lens is used to produce images.

Thus Nancy is dealing with physical science as she designs lens for binoculars and cameras.

8 0
3 years ago
What types of antigen do mature t cells normally not recognize?
kati45 [8]

Answer:

self-antigens

Explanation:

Any particle or compound gathering of a living being which goes about as an antigen in instigating counter acting agent development in another life form however to which the sound safe arrangement of the parent living being is tolerant are called self antigens

This is the medical definition of self antigens

4 0
3 years ago
Can you identify the type of root by only looking at the structure of the leaf explain â
Blababa [14]

Answer:

Simple answer, yes.

Explanation:

Monocots have isobilateral leaf I.e both sides of the leaf are equally exposed to the sun.

Dicots have dorsiventral leaf I.e. ventral side is exposed to the sun more than the dorsal side.

They are very distinctly different from each other and can be separated easily, and so are their roots.

4 0
3 years ago
Other questions:
  • Acetyl co A can
    10·1 answer
  • Which of the following is NOT a benefit of breathing through the nose? 1) extraction of heat and moisture from the air leaving t
    8·2 answers
  • Cómo están organizadas las células en los animales
    11·1 answer
  • Bell and collaborators painstakingly documented a population of fossil sticklebacks from an ancient freshwater lake over a 20,00
    9·1 answer
  • List 4 stages of making setimentary rocks
    13·1 answer
  • A mechanical ventilator may aid directly in pulmonary ventilation. external respiration. internal respiration. pulmonary ventila
    10·1 answer
  • What is the name of the organ that provides pressure to transport body fluid​
    7·2 answers
  • What's the difference between polysaccharide and monosaccharides
    6·1 answer
  • 7TH GRADE QUESTION VVVVVVVVV
    8·2 answers
  • Hello, I need double check with this question please and thank you
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!