A wisdom teeth are vestigial third molars that human ancestors used to help grinding down plant tissue. The common postulation is that the skull of human ancestor had larger jaw with more teeth, which where possibly used to help chew down foliage to compensate for a lack of ability to efficiency digest the cellulose that make up a plant cell wall.
The correct answer is "is a programmed mechanism of cell death".
Apoptosis by definition is programmed cell death. Apoptosis happens when the cell recognize irreversible damage weather in the plasma membrane, cytoplasm, organelles, or in the genetic material inside the cell. This is to prevent proliferation of damaged or mutant cells that can lead to the development of neoplasm.
