Answer:
An incorrect sample frame can destroy a study, regardless of the sample size.
Explanation:
There are major three known errors that were detected during the survey research of the political poll taken by Literary Digest about the Landon vs Roosevelt election.
These errors were
* Sampling error-- The telephone directories, automobiles that were sampled, were mostly sampled middle/upper class
* Timing -- The questionnaires were mailed in early September, they did not measure the changes in public opinions as the election drew closer.
* Self-selection-- It should be understood that an individual cannot select himself/herself into a sample. This is because,the more wealthy and educated do that so the results are entirely accurate
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The agarose gel's mesh-like structure allows for DNA separation. Larger DNA pieces become stuck and move slowly through the pores, but smaller fragments can pass through the pores quickly.
<h3>What connection exists between the DNA's size and the agar gel's structure?</h3>
Because DNA molecules have a constant mass/charge ratio, they are separated by size in an agarose gel in a way that the distance they travel is inversely correlated to their molecular weight (3).
<h3>What connection exists between the DNA fragments' size and gel electrophoresis appearance?</h3>
The negatively charged nature of DNA causes it to move toward the positively charged electrode when an electric current is supplied to the gel. Because shorter DNA strands pass through the gel more quickly than longer strands, the fragments are organized according to size.
<h3>What connection exists between the size of a DNA molecule and its rate of gel migration?</h3>
DNA fragments are separated based on molecular weight using agarose gel electrophoresis. The distance travelled on the gel correlates inversely with the logarithm of the molecular weight, with smaller fragments migrating quicker than larger ones.
To Know more about DNA separation.
brainly.com/question/264225
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