What does "the higher the level of the taxon, the farther back in time." mean

See Explanation

Explanation:

Higher level taxon indicate larger numbers of sub-taxon.  This means that time must have passed, allowing sub-taxon to evolve.  Therefore, larger, higher taxon must be older to allow sub-taxon to appear.

videntify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.