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
kirill115 [55]
3 years ago
14

Describe the principle of MPN for enumerating bacteria from a natural sample.

Biology
1 answer:
KengaRu [80]3 years ago
5 0

Answer:

MNP stands for the most probable number which is used for finding out the concentration of viable bacteria in a sample. It is commonly used to check the quality of water and its safety. Usually, the presence of fecal coliform bacteria is checked in this test.  

Principle of MNP: The sample which is to be tested is diluted serially and then inoculated into a broth medium containing lactose. If coliforms are present in the tube than it will consume lactose and release acid and gas.

Color change represents acid production and gas trapped in the Durham tube represents the gas production by bacteria. Then the number of tubes at each dilution that showed positive results are compared with standards to determine the most probable number of the bacteria.

You might be interested in
Camo clothing will break up the human shape and do what else to help the hunter remain undetected by animals?.
garri49 [273]

Along with breaking up the human shape, camo clothing lessens the visibility of movement which help the hunter remain undetected by animals.

<h3>What is camo clothing?</h3>

Its original purpose was to conceal, blend in, and safeguard soldiers. Today, people wear it to stand out from the crowd and make a statement.

Unquestionably the chameleon of clothes, camouflage is sometimes misunderstood and highly effective. Chameleons are related to disguise for defense, just like the camo pattern.

Hunters use such type of clothing in order to remain undetected by animals.

To learn more about camo clothing with the help of given link:

brainly.com/question/3503172

#SPJ4

7 0
2 years ago
A measuring cylinder contains 40 cm3 of water. When a stone of mass 69 g is dropped into the water, the stone sinks and the wate
rjkz [21]

Answer: 2.3 g cm^3

Explanation: In this case the rise in level of water is same as the volume occupied by the stone.

a) Volume occupied by the stone = 70 cm^3 – 40 cm^3= 30 cm^3

b) Density = mass/volume

                  = 69g/30 cm^3 = 2.3 g cm^3

8 0
2 years ago
What color of light most likely be present at 200 meters below sea level, an why
mihalych1998 [28]
Sorry but I do not understand your question
7 0
3 years ago
Which of the following correctly compares the sulfur isotopes 32S and 35S?
Slav-nsk [51]

The answer is : 32S has 16 neutrons, whereas 35S has 19 neutrons. If the isotope 32S has 16 protons and 16 neutrons, the isotope 35S will have 16 protons and 19 neutrons.

3 0
4 years ago
Read 2 more answers
Why are methane hydrates so difficult to extract from the seafloor?
AlexFokin [52]

The warmer the water, the larger the water depths must be to form the hydrate. Deep inside he sea floor, however, the temperature is too high for the formation of methane hydrates because of the Earth's internal heat. Oxidation Many bacteria use methane to provide energy for their metabolism.


-worldoceanreview.com

8 0
3 years ago
Other questions:
  • Predict biodiversity changes that would be expected to occur in response to changing environmental factors
    13·1 answer
  • In science, a way of explaining an object or events by using a set of facts is a(n) ? .
    11·1 answer
  • Inside of the cell has many _____ for crrying out specific life processes
    14·1 answer
  • Which of the following is considered a secondary source?
    11·2 answers
  • The three stages of cellular respiration are glycolysis, Krebs cycle, and the electron transport chain. When do cells exhibit al
    7·2 answers
  • Carbohydrates are used for what
    6·2 answers
  • The sugar in RNA is, the sugar in DNA is
    8·1 answer
  • During DNA replication, what occurs?
    9·1 answer
  • How biomass converted into energy?
    6·1 answer
  • PLS ANSWER
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!