Final answer:
Simple transposons are known as insertion sequences (IS) and have inverted terminal repeats at their ends and create direct repeats at the insertion site in the host DNA.
Step-by-step explanation:
The simple transposons are known as insertion sequences, abbreviated as IS. These are the smallest and most basic type of transposons found primarily in bacteria. IS elements contain just a few genes, necessary for their movement, including the transposase gene which catalyzes their insertion into new locations within the genome. They are characterized by having inverted terminal repeats at either end, and when they insert into the genome they create direct repeats of a short sequence of the host DNA at the insertion site.