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Introns as Molecular Evidence
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AP Biology
APB.386 Introns as Molecular Evidence
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Two species share an intron position in a gene, but the intron sequence similarity is low. Exon sequences and splice-site boundaries still align well. What is the best interpretation?
A
Low intron sequence similarity always disproves homology.
B
The conserved position and gene context can support common ancestry despite intron sequence divergence.
C
The intron must have become an exon in both species.
D
Splice-site boundaries cannot be compared across eukaryotes.
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