Which of the following is NOT a valid evolutionary explanation for why aging (or senescence) happens? Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer. b C d Alleles that reduce survival late in life, after most individuals have reproduced, will have a smaller effect on fitness than alleles that affect survival or reproduction early in life. Alleles that affect survival or reproduction early in life will have a smaller effect on fitness than alleles that reduce survival late in life. Alleles that increase reproductive rates early in life sometimes have trade-offs that reduce later survival. Many deaths of younger individuals are due to causes unrelated to life history such as predation, reducing the effects that aging has on fitness.

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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.