comparisons with other plant sequences as well as equivalent sequences in eubacteria suggest that the longer internal transcribed spacer regions of plants have evolved , at least in part , by dna sequence duplications and that the presence of the 4.5s rrna in chloroplast may result from the accidental acquisition of a rna maturation site during the evolution of longer internal transcribed spacer regions .
C0035701
rrna
C0035668
rna