Upon Sequencing the Koala Genome, You Find a Sizable Percentage

Multiple Choice

Upon sequencing the koala genome, you find a sizable percentage of the DNA is noncoding and not eukaryotic in origin.What is the most likely explanation?

A) Koalas are not eukaryotes.
B) You had contamination in your sequencing samples.
C) The koala used in the study was suffering from a new strain of influenza.
D) These sequences are a product of lateral gene transfer.
E) These sequences are remnants of ancestral retroviral infections.