Two eukaryotic proteins have one domain in common but are otherwise very different. Which of the following processes is most likely to have contributed to this similarity?

Two eukaryotic proteins have one domain in common but are otherwise very different. Which of the following processes is most likely to have contributed to this similarity? 






A) gene duplication
B) RNA splicing
C) exon shuffling
D) histone modification
E) random point mutations







Answer: C


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