It is a substance which changes the colour of reflected or transmitted light
For example chlorophyll have green pigments
For obtaining an adequate amount of DNA samples for DNA fingerprinting, polymerase chain reaction (PCR) can be used.
Polymerase chain reaction (PCR) is a technique that is used to amplify the DNA sample. The steps included in PCR are:-
1. Denaturation of the double-stranded DNA (at around 95°C)
2. Annealing of the primers to each of the single-stranded DNA templates ( at around 65°C)
3. Extension or elongation of the primers by considering every single-stranded DNA as a template. This elongation is carried out by <em>Taq </em>polymerase (at around 72°C).
With each cycle of PCR, the DNA sample is increased by 2ⁿ. Here, 'n' represents the number of PCR cycles.
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That a couple of old shirts or wash towels and turn it into a cover or a quilt
Reviewing of articles summarizes the current state of understanding on a topic within a certain discipline.
<h3>What is an article review?</h3>
This is a type of professional paper writing which demands a high level of in-depth analysis and a well-structured presentation of arguments and a critical evaluation of literature in a particular field through summary, classification, analysis, and comparison.
<h3>Introducing the main idea of an article:</h3>
The first sentence should explain the subject being discussed in the passage.
A signal phrase is a short introductory phrase that indicates that a quote or paraphrase is coming. To introduce a signal phrase, you provide an effective transition between your own ideas and the evidence used to explore your ideas.
To include a quote, use the author's last name and the page number from which the quotation or paraphrase is taken.
To include a sentence which discusses the quote chosen, you:
- Use a full sentence followed by a colon to introduce a quotation.
- Begin a sentence with your own words, then complete it with quoted words.
- Use an introductory phrase naming the source, followed by a comma to quote a critic or researcher.
Hence, a review article is generally considered a secondary source since it may analyze and discuss the method and conclusions in previously published studies.
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