Fact 1: Introns are regions that do not code for proteins.

Fact 2: Prokaryotes lack introns, whereas eukaryotes contain introns.

Given the two facts above, answer the question "What lacks regions that do not code for proteins?" with the following options: 
- prokaryotes
 - human cells
 - peachleaf willow
 - graptolites
 - barnacles
 - plant cells
 - eukaryotes
 - gastropod shells


 

 prokaryotes        