I believe this is true since mRNA is directly translated from DNA.
Covalent bonds share electrons and ionic bonds transfer them.
The correct answer is vestigial.
A vestigial composition is an anatomical characteristic, which no longer appears to exhibit an objective in the present form of an organism of the given species. Usually, these vestigial compositions were organs, which had done some essential activity in the organism at one time in the past.
The examples of human vestigiality are plentiful, involving the anatomical compositions like wisdom teeth, human tailbone, and inside corner of the eye.
