How do scientists know silver carp are at North Shore site 1 (lane 1)?
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A. One of the bands in lane 1 matches a band in the negative control.
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B. One of the bands in lane 1 matches a band in lane 2.
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C. None of the bands in lane 1 matches a band in either control.
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D. One of the bands in lane 1 matches a band in the positive control.

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent