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
mars1129 [50]
3 years ago
6

In 1928, sir alexander fleming was studying staphylococcus bacteria growing in culture dishes. he noticed that a mold called pen

icillium 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. write an "if/then" hypothesis for this observation.
Biology
2 answers:
MA_775_DIABLO [31]3 years ago
7 0

Answer:

The correct answer is - if mold present then it produces some chemical that kills the bacteria.

Explanation:

A hypothesis is an assumption or a guess based evidence already existed for explanation or arguing so that it can be tested.

Sir Alexander Fleming found that the bacteria around penicillium mold are dead whereas the culture dishes with no mold have no clear area of dead bacteria.

On the basis of the following evidence, one can hypothesize that If penicillium mold produce then it produces some chemical that kills the bacteria.

Thus, the correct answer is - if mold present then it produces some chemical that kills the bacteria.

Olenka [21]3 years ago
3 0

A mold was developing in some of the culture dishes used by Sir Alexander Fleming and was eliminating some of the bacterial population. The hypothesis is that the mold was generating a chemical, which was toxic to the bacteria in the dishes and killed them.

The hypothesis was examined by separating the Penicillium and administering it into the solution of nutrient broth. After the growth of Penicillium it was withdrawn from the broth. The broth was then eventually supplemented to the bacteria and the bacteria died. Thus, it can be concluded that the hypothesis is supported.


You might be interested in
The major threat to biodiversity is _____.
Aleks [24]
The correct answer is pollution.
4 0
3 years ago
Read 2 more answers
Which of the following molecules supplies the main source of short term energy used in cellular respiration?
user100 [1]

Answer:

G- carbohydrates

3 0
3 years ago
A hos was commonly made from shark's teeth and whale bones. <br> a. True <br> b. False
nataly862011 [7]
False
their legs were made form the spine of stingrays and they were used to ward of bad storms.
4 0
3 years ago
Read 2 more answers
HELP PLEASE IVE BEEN STUCK ON THIS FOR 30 MINUTES
Goryan [66]

Answer:

13 - b]

14 - c]

15 - a]

16 - d]

6 0
3 years ago
What is a density-independent factor in controlling a population?
elena55 [62]
Diseases are the most deadly compared to water supply, tornados, and access to food. And more and more people are dying from diseases as the world gets worse .
Plz mark brainliest
4 0
3 years ago
Other questions:
  • The part of the hair that's buried within skin is the
    5·1 answer
  • The nurse explains leopold's maneuvers to a pregnant client. for which purposes are these maneuvers performed? select all that a
    12·1 answer
  • Which statement is a logical inference based on details in the passage? Imported marmalade was available year-round. Imported ma
    7·1 answer
  • explain why there are no giant cells. Use the terms diffusion, cell membrane and cell volume in your answer.
    13·1 answer
  • What solution is needed to test for vitamin c​
    5·2 answers
  • Which makes viral infections difficult to defend?
    12·1 answer
  • The digestion of pizza, the light reactions in photosynthesis, and the removal of a stain by laundry detergent all require _____
    12·1 answer
  • Why are emotional memories retained better than memories of humdrum experiences? Select an answer and submit. For keyboard navig
    7·1 answer
  • An image produced by a microscope is called
    5·1 answer
  • An organism has the following characteristics: cell wall, autotrophic, unicellular, and eukaryotic. What kingdom does it most li
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!