Cis-regulatory and trans-regulatory elements are important for evolutionary changes to morphology because
A. Changes to the loci acted on by cis- and trans- regulatory elements affects which genes are expressed, how much, and when
B. Cis- and trans- regulatory elements evolve rapidly
C. Mutations in cis- and trans- regulatory elements can create novel proteins
D. Mutations to cis- and trans- regulatory elements can alter the genotype without affecting the phenotype
Answer: A. Changes to the loci acted on by cis- and trans- regulatory elements affects which genes are expressed, how much, and when
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