Alleles are alternative versions of chromosomes
Indicate whether the statement is true or false
FALSE
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The discovery of Tiktaalik roseae was significant for which of the following reasons?
A. It provided evidence that terrestrial vertebrates are descended from fish. B. It provided evidence that birds and dinosaurs are closely related. C. It was the first fossil to be found with soft parts preserved. D. It provided evidence that the continents were once linked together. E. It was the first fossil from which DNA and other macromolecules were successfully extracted.
A replication fork is:
a. observed only in prokaryotic chromosomes. b. observed only in nondividing cells.. c. a Y-shaped structure where parental DNA strands are separated by helicase. d. a site where one DNA strand serves as a template, but the other strand is not replicated. e. created by the action of the enzyme RNA polymerase
This enzyme cleaves both strands of DNA, swivels the ends of the broken strands to relieve the torsional stress, and then rejoins the strands.
A. gyrase B. ligase C. ribonuclease D. catalase E. helicase
Do nonsynonymous and synonymous changes occur with equal frequency? Explain
What will be an ideal response?