Two species come to occupy the same niche in a particular habitat. Over time, one of the species competes with the other for the same resources, and one of the species goes extinct while the other thrives as part of the habitat ecosystem. This scenario is an example of: - trophic levels
- the competitive exclusion principle
- ecological equivalents
-the extinction principle

A. radioactive dating

Ibelieve this is the answer:     evolution has no "goal". it is "simply" the survival of the fittest under a given condition. what should be the advantage of living longer? getting kids (=spreading the own genetic information) is done latest until the mid-40s after that we have not much biological meaning.  in addition,  not only does evolution not have a "goal," evolution doesn't necessarily mean "make us better! " it's absolutely possible to evolve negative traits.    hpe i could : )