The chart below plots the change in frequency of large vs small canine teeth in males in a certain primate population. Examine this and select the answer that best explains what the chart depicts. Frequency (Percentage % of the Population) 80% 60% 20% Frequency of Male Canine Tooth Sizes Over Time Generation 1 Generation 3 Generation 2 Time: Primate Generations →→large canine teeth small canine teeth Generation 4 Over several generations, more males in the population exhibit larger canines. Over several generations, fewer males in the population exhibit larger canines. Over several generations, both versions of the trait increase. Over several generations, canine size does not change.

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A:

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.