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
Tanya [424]
3 years ago
9

Who discovered penicillin and how ?

Biology
1 answer:
luda_lava [24]3 years ago
3 0

Answer:

In 1928, at St. Mary's Hospital, London, Alexander Fleming discovered penicillin. This discovery led to the introduction of antibiotics that greatly reduced the number of deaths from infection.

The discovery of penicillin was actually a mistake!

Fleming obtained an extract from the mold, naming its active agent penicillin. He determined that penicillin had an antibacterial effect on staphylococci and other gram-positive pathogens.

Explanation:

You might be interested in
name two major vessels that return oxygen-poor blood to the heart. What are the damages for each? Where do they terminate?
Serga [27]

Answer:

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

Explanation:

The Heart pumps the oxygen-rich blood to the different parts of the body to Otake oxygen and nutrients to these organs and then takes the oxygen-poor blood returns from the body to the heart.

The two major vessels that return oxygen-poor blood to the heart are 1. superior vena cava (SVC) that drainages Head, neck, upper limb, thorax and terminate at top of the right atrium, and 2. inferior vena cava (IVC), Lower limb and terminate at bottom of the right atrium.

1. Head, neck, upper limb, thorax - super vena cava - top of the right atrium.

2. Lower limb - inferior vena cava - bottom of the right atrium.

4 0
3 years ago
Which of the following is true of microbes?A. Ninety-nine percent of all microbes are pathogenic.B. Gene expression in bacteria
serious [3.7K]
B. Gene expression is in them is similar to us but facilitates the use of bacteria in recombiant biotechnology and gene therapy.
We human have eukaryotic cells which have a devoloped nucleas whereas small bacteria have prokaryotic cells with no definite nucleus using more biotechnology. Other all are not true.
6 0
3 years ago
Read 2 more answers
In scientific inquiry a stated possible explanation is called
Licemer1 [7]
Hello there,

The correct answer is:

C. Hypothesis

Hope this answer has helped you.


5 0
3 years ago
Read 2 more answers
Earth's rock is continually cycling through different states and locations. The diagram below shows the
9966 [12]

Answer:

Chemical changes due to heat and pressure

Explanation:

Hope it helps ❤

5 0
2 years ago
Read 2 more answers
Has anyone done this worksheet? i need help with it. thanks:)
Arturiano [62]
I have done it I think
6 0
3 years ago
Read 2 more answers
Other questions:
  • 16) During the winter time, the total number of hours of sunlight decreases. What effect would this have on the process of photo
    15·1 answer
  • Natural selection states that individuals
    7·1 answer
  • As humans have converted prairies to pastures and farms, prairie dogs have lost 98 percent of their habitat. Prairie dogs are th
    15·2 answers
  • If some wavelengths of light are absorbed by chlorophylls, what happens to
    6·2 answers
  • The chart shows the percentage of different elements in the human body.
    9·2 answers
  • Ultrasound technology is used to create medical images. <br><br> True or False?
    10·2 answers
  • Why is it more important to check for errors during DNA replication than
    13·2 answers
  • 1
    7·1 answer
  • Which phrase is most similar in meaning to scientific theory
    15·1 answer
  • U
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!