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The human body is made up of trillions of cells. The DNA within those cells is a code of genetic information and makes up the chromosomes. The chromosomes are the replicable sets of genetic information in the nucleus of each cell. The DNA in the chromosomes is made up of even smaller units. Six smaller molecules. The arrangement and order of these molecules makes up DNA.
It’s complicated. But it works. It works inside us everyday. Life, living, thriving and reproducing, even evolving. From the super small to the planetary scale. And even though we find it hard to visualize a trillion of anything. Life has organized many trillions of cells to make up our bodies.