Why do scientists think that introns and exons contribute to evolutionary flexibility?

Many biologist think that this organization of genes add evolutionary felixablity . Each Econ protein adds a different part of a protein by having introns and Exons fellas can occasionally shuffle exons between genes and make new ones.

You should provide a picture to show where the arrow is pointing and which information that is given. but there are 3 branches of the government, legislative, executive, and judicial. legislative makes laws, executives pass laws, and judicial are the courts