Genome Size Varies Greatly Among Eukaryotic Species

Genome size varies greatly among eukaryotic species. For multicellular eukaryotic organisms, there is no clear relation between organismal complexity and amount of DNA or gene number. A substantial part of the genome in eukaryotic organisms consists of repetitive DNA, much of which is derived from transposable elements. Vast regions of DNA may contain no genes or other functional sequences. Many eukaryotic genomes have homologous genes in common, and genes are often in the same order in the genomes of related organisms.
-Segmental duplications play an important role in evolution by

A) giving rise to new genes and multigene families.
B) keeping the number of genes in a genome constant.
C) eliminating repetitive sequences produced by transposition.
D) controlling the base content of the genome