How does radiometric dating scientists pinpoint the age of a fossil?
a. in radiometric dating, scientists mix the carbon in a fossil with carbon from similar fossils whose age they know. by comparing the carbon, they can tell the exact age of the fossil.
b. radiometric dating allows scientists to find fossils in only the lowest and oldest layers of sediment.
c. in radiometric dating, scientists place samples of a fossil in certain liquids until the samples dissolve. the rate at which they dissolve indicates the age of the fossil.

Which of the following statements regarding anfinsen's denaturing experiments with ribonuclease a (rnase a) are valid? exposing the denatured protein to air oxidation and then dialysis to remove urea restored the protein to its original functionality. removing urea by dialysis and then allowing air oxidation of the denatured protein restored the protein to its original functionality. denaturing the protein with both urea and β-mercaptoethanol yielded an inactive protein. anfinsen concluded that protein folding is determined by its primary sequence.

What claim did thorne make? what evidence supported his claim?

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.