Its important to understand that evolution does not “design” anything with intent or purpose. Its all chance and survival of the fittest does select for traits that confer greater survival.
But plenty of traits are neutral or minimally negative in their survival benefits so also suriviveor develop. And it only affects traits that impact reproducing and passing on traits to the next generation. So many traits may be totally unaffected by evolutionary pressures as they have no relevance to survival of the fittest.
Plus the other species being competed woth over time and the environment generally shape what traits are desirable versus detrimental.
Basically not everything has an evolutionary purpose or function.
Its a glitch.
Its important to understand that evolution does not “design” anything with intent or purpose. Its all chance and survival of the fittest does select for traits that confer greater survival.
But plenty of traits are neutral or minimally negative in their survival benefits so also suriviveor develop. And it only affects traits that impact reproducing and passing on traits to the next generation. So many traits may be totally unaffected by evolutionary pressures as they have no relevance to survival of the fittest.
Plus the other species being competed woth over time and the environment generally shape what traits are desirable versus detrimental.
Basically not everything has an evolutionary purpose or function.