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Nonamiya [84]
3 years ago
15

Fish populations and other aquatic resources are likely to be affected by changes in what aquatic factors? a. Water temperatures

b. Disease c. Water quality d. All of the above.
Biology
1 answer:
Nataliya [291]3 years ago
4 0

Answer:

The answer should be D - All of the above.

Explanation: If water is too cold, fish will die. If water is too hit, fish will die.

If there is a disease in the water, fish can get infected resulting in death.

Some fish live only in specific type of water. For example, if some fish dont have salt in the water, they will die. (sharks)

Make sure to give thanks! <33

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What is the dilution factor if 2 μl of DNA sample is added to 498 μl of water (Dilution factor = Final volume / Aliquot volume)?
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Answer:

The correct answers are: Dilution factor = 250 and concentration of DNA in undiluted sample = 2.5 μg/μl.

Explanation:

  • Volume of DNA taken = 2 μl.
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  • Total volume of the sample = 2 μl + 498 μl = 500 μl.
  • Dilution factor = \frac{Final Volume}{Aliquot volume}  = 500\div2 = 250.
  • A₂₆₀ of the given sample is = 0.2.
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  • Again, Concentration of DNA(µg/ml) = A_{260}\times \texrm{dilution factor}\times 50 µg/ml.
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  • In order to convert it into μg/μl, we have to divide the above value by 1000, hence we get, 2500\div1000 =2.5 μg/μl.
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