Scientists use evidence from their findings to support theories of life on earth. Which of these findings could not be used to p
rovide supporting evidence that life on earth has changed over time?
Choose the correct answer.
a) increasing complexity of fossils in younger rock layers
b) increasing diversity of fossils in rock layers following an extinction
c) transitional fossils
d) rock layers with no fossils
Choose the correct answer.
a) increasing complexity of fossils in younger rock layers
b) increasing diversity of fossils in rock layers following an extinction
c) transitional fossils
d) rock layers with no fossils
1 answer:
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Answer:
E. Gene is amplified by multiplication of cloning host
Explanation:
PCR is a very powerful technique that can help us to amplify exponentially one gene from a very small sample of DNA.
As seen in the attached image, the process begins with a single DNA molecule, for the first cycle, that DNA molecule denaturalizes into two strands, the primers bind to their complementary sides and then the DNA polymerase builds the new DNA strands. The number of copies of the gene that can be obtained with each cycle are 2ⁿ copies, where n is the cycle number.
