Tantalum.................
DNA is the genetic material that controls cell activities<span>. </span>In eukaryotic cells<span>, the membrane that surrounds the </span>nucleus<span> which is commonly called the nuclear membrane , partitions this DNA from the </span>cell's<span> protein synthesis machinery, which is located </span>in<span> the cytoplasm.</span>
Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.
