Describe how scientists use fossil finds and radiometric dating to piece together evolutionary history. Why is this useful when scientists discover a missing link fossil?
What will be an ideal response?
Scientists use radiometric dating to identify the specific age of a fossil. They can then directly compare different fossils to determine the evolution of a species. Sometimes, it is important for scientists to find a "missing link" fossil that demonstrates whether their predictions are correct or incorrect. Specifically missing link fossils that aid in the demonstration of a gradual change in a body structure are very useful.
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Which of the following polymers contain nitrogen?
A) starch B) glycogen C) cellulose D) chitin E) glucose
Biochemical tests are used to determine
A. nucleic acid-base composition. B. enzymatic activities. C. amino acid sequences. D. staining characteristics. E. All of the answers are correct.
Hemoglobin contains which element?
a. chlorine b. sodium c. iron d. copper e. magnesium
Which of the following is true regarding saturated fatty acids?
A) They are the predominant fatty acid in corn oil. B) Theyhave double bonds between carbon atoms of the fatty acids. C) They are the principal molecules in lard and butter. D) They are usually liquid at room temperature. E) They are usually produced by plants.