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sesenic [268]
3 years ago
11

If we have a plate that has 2500 colonies on it, can we use this plate to calculate CFU's

Biology
1 answer:
AleksAgata [21]3 years ago
6 0

No, the solution with bacteria in it needs to be diluted in order to be in the range of 30 – 300.

A colony-forming unit –CFU is used to estimate the number of viable (ability to divide by binary fission) microbes in a sample.  

A sample of microbes is diluted and spread on a plate. Then, the number of colonies is counted, assuming that each colony have grown from a single colony-forming unit, or CFU.

Plates with more than 300 colonies are difficult to count while those with less than 30 colonies give statistically unreliable numbers of colonies to count.

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An established 47 year-old patient presents to the provider's office after falling last night in her apartment when she slipped
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Which vessels are most intimate with the nephron loop and serve as a point to collect ions and water back into the blood?
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how does using the si v-scope compare to using a physical microscope? include at least three similarities and three differences
Svetach [21]

The similarities are;

  • Both of them depend on light to function
  • Both of them could be adjusted during studies
  • The object could be magnified or diminished during study.

<h3>What is SI V-Scope?</h3>

The SI V-Scope is a sort of a virtual  microscope that is designed to operate in a manner that is similar to that of the compound light microscope. The both tools could be used for investigation.

Recall that a microscope is a device that could be used to see a very small specimen. The first microscope was the compound microscope and was invented by Robert Hooke. This microscope was used to observe the cells of cork.

The following are the similarities between compound light microscope and  SI V-Scope;

Both of them depend on light to function

Both of them could be adjusted during studies

The object could be magnified or diminished during study.

Learn more about microscope:brainly.com/question/18661784

#SPJ1

5 0
1 year ago
If a particular gene is located on the Z chromosome of this lizard species, describe why a lizard with a ZW genotype has a great
Alenkasestr [34]

Answer:

ZZ species will take more number of crosses to produce a recessive offspring.

Explanation:

Here Z seems to be the dominant allele.  A species having ZZ or homozygous dominant genotype shall not express the recessive phenotype until unless it has both recessive allele and this is not possible as of now or is dependent on the genotype of mating species and the number of generations of development.

If ZZ mates with WW, the offspring in F1 generation will have genotype ZW

However, if the offspring in the F1 generation are crossed then in next generation we could see organism with recessive phenotype i,e WW

ZW*ZW

ZZ, ZW, ZW, WW

While in case of organism having ZW type genotype, recessive phenotype will occur in the first generation cross with the ZW.

8 0
3 years ago
Complete each statement by writing the correct word or words.
ivann1987 [24]
1) transcription.-
2)Transcribed.-
3)Cells nucleus.-
4)Cytoplasm.-
5)RNA polymerase.-
6.-
7)Introns.-
8)Exans.-

Hope this helps!
5 0
3 years ago
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