Answer:
It's DNA.
Explanation:
<em>DNA</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>most</em><em> </em><em>recent</em><em> </em><em>utility</em><em> </em><em>to</em><em> </em><em>determine</em><em> </em><em>the</em><em> </em><em>origin</em><em> </em><em>of</em><em> </em><em>an</em><em> </em><em>organism</em><em> </em><em>and</em><em> </em><em>it's</em><em> </em><em>powers</em><em> </em><em>compared</em><em> </em><em>to</em><em> </em><em>it't</em><em> </em><em>weaknesses</em><em>.</em>
<em>Nowadays</em><em>,</em><em> </em><em>it</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>primary</em><em> </em><em>tool</em><em>:</em>
<em>Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid are nucleic acids. </em>
The correct answer from the choices listed above is option A. Adaptations took advantage of the presence of free oxygen in the oceans and atmosphere by the <span>evolution of cellular respiration, which used oxygen to help harvest energy from organic molecules.</span>
