Answer:
The human genome contains approximately 3 billion of these base pairs, which reside in the 23 pairs of chromosomes within the nucleus of all our cells. Each chromosome contains hundreds to thousands of genes, which carry the instructions for making proteins.
I think it is the 3rd one because health problems at older age.
A car
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B. Being Biased as scientists want concrete facts that haven't been influenced by bias or outside forces.
